PDF malware analysis — malicious · 12fac1cd493eb53e

MALICIOUS

PDF

88.9 KB Created: 2021-07-13 08:47:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: b18e60c6cf34d8756a3bf3b0421f22f2 SHA-1: 0854a2bd0fca49b456d1ef331039fa680b76ef16 SHA-256: 12fac1cd493eb53e5536239879fdaa9ddb4b8ba2f1414019a6f7dc48488311e4

204 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting it's part of a phishing or malware distribution campaign. The 'SE_CLICKFIX' heuristic indicates social engineering tactics designed to trick users into running commands, likely to download and execute a secondary payload. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

Nyx PDF Classifier malicious score 0.9822

Heuristics 8

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
ClickFix social engineering attack high SE_CLICKFIX

Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://garglob.ru/uplcv?utm_term=drop+two+voicing PDF link annotation
- http://cphs1970.net/clients/877309/File/fefudir.pdfIn PDF document text
- https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607194b56d8a2---40074956794.pdfIn PDF document text
- http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdba3c229f---berusasovoji.pdfIn PDF document text
- https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/3b40364ed66a57697c3d5b4c7576371a/2330142757.pdfIn PDF document text
- http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bb061fa909e---98477748557.pdfIn PDF document text
- http://burningspearmarketplace.com/js/ckfinder/userfiles/files/muvowusozataraba.pdfIn PDF document text
- https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/4v1bcd8rd8bgar7ltjr8bi4ar2/80320171929.pdfIn PDF document text
- https://ietc-oman.com/userfiles/files/33992477385.pdfIn PDF document text
- https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f58ca86709---potetadijijepiparoxofej.pdfIn PDF document text
- http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef2ab644f3---41298947280.pdfIn PDF document text
- http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/6e3b111d3edf550d2e57a746ee635b0f/keralasori.pdfIn PDF document text
- https://tadimtursu.com/image/files/fusarazilabuvegib.pdfIn PDF document text
- https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/6568e68c3a2887882278343c61dcbe0c/lagote.pdfIn PDF document text
- https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/1s5m6vnk2so4830pmqbjtigpnk/jasuruxidamurudesov.pdfIn PDF document text
- https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/51eb9309e9ce302c7a679b8cdc9810f3/xufosepesojife.pdfIn PDF document text
- https://jesssmithtri.com/jesssmith/ckfinder/userfiles/files/gexarik.pdfIn PDF document text
- http://gerd-pollak.de/userfiles/file/69185397552.pdfIn PDF document text
- https://bio86.net/fichiers/sabofilofonevenam.pdfIn PDF document text
- http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16094346356f2d---jirosivelidepar.pdfIn PDF document text
- http://diamantina-joaillerie.com/ckfinder/userfiles/files/ramapasugofikutara.pdfIn PDF document text
- https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/3f486607465cbee13d281b5fd6501c3a/85411286972.pdfIn PDF document text
- https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/263492a7575211e7408a4a722210cb2a/41695617912.pdfIn PDF document text
- http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608a09f54dc64---7298491987.pdfIn PDF document text
- https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/9f4263ec4b3360ca2e8f3db2769a2750/38602375760.pdfIn PDF document text
- http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16084fbf281143---20237981231.pdfIn PDF document text
- http://yuha.be/_files/file/fajulojokifofiweremazef.pdfIn PDF document text
- https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b782c85d350---jikesobusane.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000fa4e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA4E	17356 bytes
SHA-256: `e2f1ed5a53d39ec9c3c59d06820d3c6886c4a51c845386dfcb4898a1c09353cd`
`font_01_sfnt_off0001276b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1276B	10192 bytes
SHA-256: `d3fcc70f1cc220c3726db76dc930898fb815a1810f520a41bb33a076eceeb08f`
`font_02_sfnt_off00013e67.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13E67	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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