PDF malware analysis — malicious · 5931f0cc662b28b9

MALICIOUS

PDF

87.0 KB Created: 2021-06-30 23:56:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: 1041d3ba43b08a7a4ed2a9e4b63a1957 SHA-1: 4d9d6953bb5b4acd513ff881b8f0e6540281d236 SHA-256: 5931f0cc662b28b99a12f167f5eb3d4b64e731da4dd08bd7d21e0cf16c42e0fd

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external URLs, many of which are hosted on compromised WordPress sites, likely to facilitate the download of further malicious payloads. The presence of a visual download button lure further supports the phishing or social engineering aspect of this attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9970

Heuristics 7

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://nomylo.ru/uplcv?utm_term=playboy+the+mansion+download+android PDF link annotation
- https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/f4b713952b27a584366118756a5632b9/77456088889.pdfIn PDF document text
- https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/6de3a045af1645572b8a2b07fa22834e/91773092433.pdfIn PDF document text
- http://propellerclubsandiego.org/uploads/files/nalabawobuluxufad.pdfIn PDF document text
- http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/d7srgot3l89n5tg8rv4bdnnjp6/mizutokariminasanufikuwi.pdfIn PDF document text
- http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/bd01b254804e9583279aeb7d89ff598e/vidifabanazukeni.pdfIn PDF document text
- http://fiscalonline.eu/app/webroot/files/userfiles/files/8042974037.pdfIn PDF document text
- https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d7f49a85fd6---zevekukobuvata.pdfIn PDF document text
- https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbe6bb2b8e---94130544034.pdfIn PDF document text
- http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/16095e52a21523---bariwu.pdfIn PDF document text
- http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072657db7a21---nelixategirigexumuta.pdfIn PDF document text
- http://blbr365.com/userfiles/file/1621746996.pdfIn PDF document text
- https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/7e77b8873a36735474dfe58f6e6fa6cc/48357997284.pdfIn PDF document text
- http://minhvuongthuphap.com/upload/ck/files/dawesegevisa.pdfIn PDF document text
- https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/442b6cf196514619e789969a23d1c36c/rupomejuzuli.pdfIn PDF document text
- https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/b0594fed9e3dd548eb8dd5154f790fb5/mamerawimumirobevamemigu.pdfIn PDF document text
- https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/e41433dd387b111053689393b334bf01/92522399274.pdfIn PDF document text
- https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dad1ffc694c---70530614630.pdfIn PDF document text
- https://conexus-study-abroad-travel.com/ckfinder/userfiles/file/7072626494.pdfIn PDF document text
- https://akita-inu.lv/www/files/files/12408721836.pdfIn PDF document text
- http://villa-carlshorst.de/sites/default/files/file/manop.pdfIn PDF document text
- http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608be1269a781---mokorulikonikozili.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_off0000ef4b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF4B	18040 bytes
SHA-256: `0a61ccb762cb510361fcda723b3959a9b516918885614407db2a6303cd852f32`
`font_01_sfnt_off00011dde.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11DDE	10856 bytes
SHA-256: `a5c2051016834c3439ef78c692ef3580a0263e36464bf29167d51d3e84b91255`
`font_02_sfnt_off000136d4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x136D4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

Open this report in the interactive analyzer, or submit your own file for analysis.