Malicious PDF — malware analysis report

Static analysis result for SHA-256 e088b26dbedac59b…

MALICIOUS

PDF

82.6 KB Created: 2021-09-11 12:03:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9bd104b224809226c95269a1f5a8a1b1 SHA-1: 126e53548a5cd0c2a421045730582c92877d8fa8 SHA-256: e088b26dbedac59b86012164b8270086bdb0e2975ee7a7509be1fc69cde2f8dd
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a callback phishing lure. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it is designed to redirect users to malicious sites or prompt them to call fraudulent numbers. The presence of numerous links to potentially disposable domains further supports a phishing or scam-related attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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://oniceh.ru/uplcv?utm_term=how+to+close+tabs+on+android+browser PDF link annotation
    • http://minhledtran.com/luutru/files/rateve.pdfIn PDF document text
    • http://srtprogetti.eu/userfiles/files/nujojomon.pdfIn PDF document text
    • https://gosselindesign.com/images/from_fckeditor/fichiers/87851003392.pdfIn PDF document text
    • https://almuhja.ps/ckfinder/userfiles/files/wutitasaxifopabulitoruwef.pdfIn PDF document text
    • https://service-panev.com/userfiles/98038576027.pdfIn PDF document text
    • http://moveworldtogether.com/datas/files/6147266927.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/krld91smetdnnh9t6c2ub9nti1/totezopujovuninitufufa.pdfIn PDF document text
    • http://planbmedia.hu/files/19034763392.pdfIn PDF document text
    • https://orsam.org.tr/paketler/ckfinder/dosyalar/files/zafaruwabusagobuw.pdfIn PDF document text
    • http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/dilawalakodumeluxinewabek.pdfIn PDF document text
    • http://www.look4job.gr/images/_user_na/file/94770671832.pdfIn PDF document text
    • http://uran-berlin.com/userfiles/file/botovi.pdfIn PDF document text
    • http://af.ssla.ru/images/fornews/files/89993375360.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/f71b554bd69fabbdd5b099b9c64a06a0/76454354274.pdfIn PDF document text
    • http://pro-group.ru/userfiles/file/firipijivafaxuxavo.pdfIn PDF document text
    • http://astmasme.com/userData/board/file/74531644610.pdfIn PDF document text
    • http://chongthamphucthang.com/images/news/files/wigopovizesexafap.pdfIn PDF document text
    • https://lecormier-menuiserie.com/www/upload/files/53943818807.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/dejafa.pdfIn PDF document text
    • http://ldksolar-officialliquidation.com/userfiles/files/sonok.pdfIn PDF document text
    • https://softwebstar.com/shop/userfiles/file/44608431998.pdfIn PDF document text
    • https://ixiu-23.com/uploads/files/202109060153167142.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/09/03/file/42794897494.pdfIn PDF document text
    • https://vasantviharproperties.com/userfiles/file/wozupip.pdfIn PDF document text
    • http://www.salpasafarit.fi/tiedostot/files/rilovegu.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_off0000dc8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC8F 10580 bytes
SHA-256: f372da3e79346a437f48882a3ab703862e6fe06fefd311fad2387a292e44abe7
font_01_sfnt_off0000f4d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D2 18084 bytes
SHA-256: e18eadabf03aca72dcdc6327bb2654dab90bfa55a7fb431ae8c34dabaca60504
font_02_sfnt_off00012407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12407 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1