PDF malware analysis — malicious · b0140a9e7d883a7c

MALICIOUS

PDF

86.8 KB Created: 2021-07-01 21:55:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 4474670d64fc171a323508494b5b70bd SHA-1: c5d77bdc72c049f026daafcfdb131ef9c71ca715 SHA-256: b0140a9e7d883a7cb2fb783b6a9c0495d7cc745c8334aca3dccbd7d15e22a807

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to compromised WordPress sites. These links likely serve as redirects to malicious or phishing content, aligning with a phishing attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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 http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607e33624fc87---dowiroruxetizadeg.pdf In PDF document text
- https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b1944ec66---mopekijopezusa.pdfIn PDF document text
- https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/2ser1kjq582ie548kv42sa38vm/17772430718.pdfIn PDF document text
- https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/9de05ad633bc2d2851250e6b4567b80e/43088370504.pdfIn PDF document text
- http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac16c6d499---97022489125.pdfIn PDF document text
- http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/me3mvgt5m8015uiiekev9d14h1/59564207794.pdfIn PDF document text
- https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/faba98ddaa775705774fcbce78c840c0/dujuxexemi.pdfIn PDF document text
- http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d9e5ab1c1---biworapafekazeloza.pdfIn PDF document text
- http://qianlong99.org/ckfinder/userfiles/files/71076366181.pdfIn PDF document text
- https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b74f2aaa1ce---49187725857.pdfIn PDF document text
- http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ac93aff0411---9073115180.pdfIn PDF document text
- http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/e922cec04f7f410f3e2e14b7efd88e98/9566761908.pdfIn PDF document text
- https://carrieres-pierre.com/userfiles/file/xanevi.pdfIn PDF document text
- http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb10005753---28121573282.pdfIn PDF document text
- http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160cd36c726718---xilavaf.pdfIn PDF document text
- https://mfdesign.hu/files/file/kajurigarelenabimadug.pdfIn PDF document text
- https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8c0b39fdd5---87077814631.pdfIn PDF document text
- https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608163706c815---raruxasilawelafa.pdfIn PDF document text
- https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/ktgqh8hqv6ohj7vpbht9kr6f9v/68834870147.pdfIn PDF document text
- https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/d8e54f26a67e0ba97f18b691fba6cd01/75995991520.pdfIn PDF document text
- https://tavio.ru/files/file/zopum.pdfIn PDF document text
- https://travelstore.tn/userfiles/file/9270135900.pdfIn PDF document text
- https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/5f158330c36d6774b005a972867f77e4/jedetoxadar.pdfIn PDF document text
- https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/13e0c76bc63c73f3405bb29e368ab051/vamufiwezafuvit.pdfIn PDF document text
- https://instalacje-elektryczne.net/ckfinder/userfiles/files/zalozumopazoxonomurazaxoz.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=amiens+floating+gardensPDF link annotation
- 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_off0000f0c5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF0C5	10680 bytes
SHA-256: `655b902b3cc20e34fceff583ecdf20caa75b9394406653fdefc8cbc1e61d3e97`
`font_01_sfnt_off00010907.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10907	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012119.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12119	17392 bytes
SHA-256: `219ce1caf380e234fa23c20c45c78b4e5c06f20708faf208fc4ade8d207c366f`

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