Malicious PDF — malware analysis report

Static analysis result for SHA-256 182cfa184e088567…

MALICIOUS

PDF

116.6 KB Created: 2021-06-29 05:45:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 62b6e89f0cacea40c67e46e1eeb5e00e SHA-1: 2c7e880b5193e4968fe00f531b4da3eecae95fa0 SHA-256: 182cfa184e088567aeeab8d2de9806999ebcaadf7fd6d287379ca38876bfb2ed
116 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a callback phishing or tech-support scam, as indicated by the 'SE_CALLBACK_LURE' heuristic. It contains numerous embedded URLs, many of which point to compromised WordPress upload directories, suggesting an attempt to host malicious content or redirect users. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

Heuristics 6

  • 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://wastran.ru/uplcv?utm_term=maternity+and+redundancy PDF link annotation
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607887150718d---ribefojasuzanofukeges.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095dc5394323---8050742894.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/059259a8a4df28054914b2b663435f62/gepav.pdfIn PDF document text
    • http://sparkpro.lv/content/file/pazadulalumegebiwugavudej.pdfIn PDF document text
    • https://voyagerf.ru/wp-content/plugins/super-forms/uploads/php/files/9cd56cb8bf06db13a378b06246a854af/jutafem.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/93306344660.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082570d9129c---84041922638.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b089480c645---33223281015.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/39eb23f2163e3c40e331fc820f01b292/13473721250.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160da5987872b0---5410546819.pdfIn PDF document text
    • http://zlato-invest.cz/upload/files/25241373996.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba447520d59---wuzemok.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091b9f20b0a2---41381401430.pdfIn PDF document text
    • https://egyiksem.hu/uploads/file/78151191108.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d457b980feb---siziwepimip.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/635cb944248df4418d8320fdd6e9de8a/pijajekazuzivarewiwowu.pdfIn PDF document text
    • http://iglozawiercie.pl/zdjecia/file/xugafugidigirujoj.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a86e2e9c8ac---tidokusaboxe.pdfIn PDF document text
    • https://infiniteprospects.com/FCKeditor/file/80542009383.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/6dcaa7b6ed9d6fc1b08d12be0bc3a2a8/gobawudo.pdfIn PDF document text
    • https://henklinders.nl/henklinders/upload/files/44484744198.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/l7cg4re60diefvrsakmbp8tcbh/jojisefomilanivok.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160863d5c24f7b---76726863137.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085868075b61---zadaralaxapifepovexadanep.pdfIn PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/0e12157797ad40311cd036d1bbe0b9c9/72441264383.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.

FilenameKindSourceSize
font_00_sfnt_off0001687d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1687D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00018094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18094 10236 bytes
SHA-256: 8ac488b4971975c852d337a13052eba931d29c9f94bcf66e776e77f34bc1eb1b
font_02_sfnt_off000197ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x197AE 17396 bytes
SHA-256: a49630c6a17725a81ce80378ae71844b3e77bfbd3fb9feb071b5923670c5f310

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