Malicious PDF — malware analysis report

Static analysis result for SHA-256 476a85158ade6d79…

MALICIOUS

PDF

84.7 KB Created: 2021-06-27 11:53:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 84ef123b55bf06a9d8c2987e1f5ae253 SHA-1: 2c90e3b9516b3dccb7ef3c20fdd5ab2950143ad4 SHA-256: 476a85158ade6d79785ae133759849892620f993535636713df2f615a5798055
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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.
  • 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://allseasonsart.com/uploads/fck_uploads/file/93718671040.pdf
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/k3m2ua09ggmr7aoo0ur0uo6hms/rukutivijulonivijonixobo.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/3b96706faaa28164f25abf89cf96d2fe/xopaxotepatil.pdf
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/ec044a0f5e47306ef161f43437c7834e/58344245386.pdf
    • http://abwlanham.com/uploads/files/57140081220.pdf
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/160845c3f9940a---81526497456.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160d04c488080f---nalitapuvofetes.pdf
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c815eaef38---nebet.pdf
    • https://candbco.com/ckfinder/userfiles/files/timuzuwaginubezero.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/a834f2cf9dedd3ed29661bf789a4ce60/gidivavusufazugu.pdf
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/bb6f62c02d39cf22ecd282eb4b7a87f6/wudorefibesavud.pdf
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160985635045e3---6375919169.pdf
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084df4a0f6a9---pofewebulakobima.pdf
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16090d36eacad3---54051262555.pdf
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c793f34049a---fikumesipob.pdf
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/782s7tr14ct430qvpchfq59qn3/dogapuzudimeruzevofarinux.pdf
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/cuk4crri2crdni4pkc6201u34a/jajaxokomum.pdf
    • https://istanajpdua.com/contents//files/nugazo.pdf
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3ece650f02---lagudiridomadutefuxum.pdf
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1e56efc34---liveginuxajedulimi.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/76548577532.pdf
    • http://brandnewgoods.net/userfiles/file/musenefomuwokodax.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c058c1150bb---63033089853.pdf
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071dcdcb69a4---damumulirudo.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=june+in+the+handmaid%27s+tale
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb90.bin
915019c2725878b11548e8dfd48b068ea33c3ffefa01608cefc6b07f6dd04b0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB90 16184 bytes
font_01_sfnt_off000115b9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115B9 16792 bytes
font_02_sfnt_off00012dd0.bin
b08b84d23e719703e9c9155aae403a9900c33d4a9303b8922a89d5f27b45a5da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD0 10416 bytes

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