Malicious PDF — malware analysis report

Static analysis result for SHA-256 3334d8a44f65ba30…

MALICIOUS

PDF

68.7 KB Created: 2021-09-25 23:31:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 2cbe0be5d2d250c492d0f5f9644bc5c4 SHA-1: 8759d7c7da452f74c62964ff045916f2be018392 SHA-256: 3334d8a44f65ba305b3c4cd15be495493510ef9441be37168ef6515c9316cc27
86 Risk Score

Malware Insights

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

The PDF file was flagged by an ML classifier as malicious with high confidence. Heuristics indicate it functions as a link farm, containing numerous external URIs pointing to potentially malicious domains. The 'SE_CALLBACK_LURE' heuristic suggests the document may also attempt to trick users into calling a fraudulent number, consistent with phishing or tech-support scam tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 5

  • 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://philabc.ru/uplcv?utm_term=hentai+full+game PDF link annotation
    • https://at2-turbo-j3t.com/contents/files/25204523908.pdfIn PDF document text
    • http://chinawin-consult.com/userfiles/18927169464.pdfIn PDF document text
    • http://mcserpenti.com/userfiles/file/dolawofiwezazatamez.pdfIn PDF document text
    • https://ccskin.com/geektic/files/86812099692.pdfIn PDF document text
    • http://alt-1c.ru/userfiles/file/fefosedetuwutolabikulali.pdfIn PDF document text
    • https://taxforce.nl/userfiles/files/81903518482.pdfIn PDF document text
    • https://www.db-ynox.fr/ckfinder/userfiles/files/19991537310.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/74430845893.pdfIn PDF document text
    • https://alistairmills.com/ckfinder/userfiles/files/91465997934.pdfIn PDF document text
    • https://bokaichenyu.com/upload/files/lotupadidamavajab.pdfIn PDF document text
    • http://hunting.kg/userfiles/file/95558962046.pdfIn PDF document text
    • https://nic-irq.com/userfiles/files/gipirijifowoxigubowure.pdfIn PDF document text
    • http://kxzyjy.com/CKEdit/upload/files/tanolijujuz.pdfIn PDF document text
    • http://sculecuacumulator.ro/app/webroot/files/userfiles/files/sewaforovujekarubol.pdfIn PDF document text
    • http://holidayinntorino.com/userfiles/files/18820207093.pdfIn PDF document text
    • https://biharlokmanch.org/userfiles/file/pinedibaxajolodoli.pdfIn PDF document text
    • http://lighthouse-connection.at/myPix/file/fawotuwigavuroxukepegub.pdfIn PDF document text
    • http://hotelgiottotorino.com/userfiles/files/gapot.pdfIn PDF document text
    • http://beganijewellers.com/ckeditor/ckfinder/userfiles/files/disosodokukevevezoral.pdfIn PDF document text
    • http://demo-enriquemora.shopcloud.es/ckfinder/userfiles/files/83260843319.pdfIn PDF document text
    • http://majstrissmt.eu/www-data/file/vubamixetifumudef.pdfIn PDF document text
    • https://blogsma.com/files/9988098001.pdfIn PDF document text
    • http://mstreatmentadvances.com/userfiles/files/23621970858.pdfIn PDF document text
    • http://xn--80aikni6a0b.xn--p1ai/images/file/58208788003.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_off0000ae79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE79 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c68b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC68B 15156 bytes
SHA-256: 7a0f6d14af5060204faac74245cf0b014d08360bd3b9c3f423d97c22a5140e06
font_02_sfnt_off0000ed00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED00 10260 bytes
SHA-256: e6d4a8f2a1b31236424fa9db7ce780d80d7bddf6dd0fa6d3e470dd5aa939a43f

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