Malicious PDF — malware analysis report

Static analysis result for SHA-256 edaf3cc2a8d9ab11…

MALICIOUS

PDF

88.3 KB Created: 2021-06-26 00:19:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1c76372eea342283099aa3303c97592d SHA-1: 84fe86fb6b729c4eebfb32bd1565c1d0b11575a5 SHA-256: edaf3cc2a8d9ab113432972d494556cbe736a0e7bd3191072cd566785e223aa8
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The 'SE_CALLBACK_LURE' heuristic strongly suggests the document is designed to trick users into calling a fraudulent phone number, consistent with callback phishing or tech support scams. While no scripts were explicitly extracted, the PDF structure and embedded URLs point to a link farm hosted on compromised or disposable domains, likely serving as a lure to a malicious site or service.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/2fe5b3a196f812b61959b80ff400bd33/91604990530.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16087a722d3e51---34757147100.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a907750dd5b---38086182997.pdf
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//bamemawimoraza.pdf
    • http://emirates-offshore.com/uploads/image/file/79456270519.pdf
    • http://fouladsazanco.com/Upload/file/74754463936.pdf
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a82cb9efdd9---pibidufodazetajafijeluv.pdf
    • http://saptpadi.com/files/file/90179377729.pdf
    • http://adirondackseafood.com/ckfinder/userfiles/files/funezukesok.pdf
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6e9ac6fb3---lopobosimekaxo.pdf
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160add397874d1---nuzudemodafopexug.pdf
    • http://fresh-j.info/images/uploadedimages/file/kiwobibem.pdf
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/736kmbqs82hjglp6u0egb9r78d/67122780525.pdf
    • https://x-software.cz/data/file/vadavabuvonil.pdf
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b91e62a7215---bifaxijelonojozunefizolus.pdf
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/6u97p9s0rikfmb21gqqe9kf9sv/derisodosobozumabale.pdf
    • http://zonweringbelgie.nl/ckfinder/userfiles/files/fokafarikes.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4ff3099f5---18097426335.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd8400a03d---zedajup.pdf
    • https://stijsr.com/userfiles/file/88486687444.pdf
    • http://gymostrov.org/gymostrov/userfiles/file/wofajirijusavasom.pdf
    • https://allcreaturesinc.com/files/files/ludulozunalifoditosodad.pdf
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/cbaf21b318315ac8e141917a325d1e4b/popurisiw.pdf
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/e3cadb1c70893111e5bcc222d13edae4/33564367271.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=xenoverse+local+multiplayer
    • 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_off0000efb4.bin
2dc8399554a9f9f851b40db08f559a6103e1ec6408ee09940e7aae8d64186227
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB4 10824 bytes
font_01_sfnt_off000108bd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x108BD 16792 bytes
font_02_sfnt_off000120cf.bin
05a2ea15bae1241b7b2cee2a7e2b07e084cba9a5e3bfc15b2f2b13716e121e81
pdf-font-stream PDF embedded font (sfnt) at offset 0x120CF 19712 bytes