Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e4163e0240a7901…

MALICIOUS

PDF

82.5 KB Created: 2021-09-18 20:37:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b2a6006c260fb747f62e601977fd1244 SHA-1: 1857688a4d7bb88ba6e3ae76d7ce373425e10b60 SHA-256: 2e4163e0240a7901d4d3c19460309802da71b5c68cb015d3b12b580f9b6e447c
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many pointing to compromised or disposable hosting, suggesting a link farm or phishing lure. The presence of a callback lure heuristic further supports a phishing or scam-related attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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.
  • 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://allytemp.ru/uplcv?utm_term=se+for+android+has+been+disabled
    • http://copy-office.it/userfiles/file/nifetonoboliletebivijedu.pdf
    • https://bistakalikotenetwork.com/userfiles/file/novamipilizuwopi.pdf
    • http://magyaringatlanadatbazis.hu/dev/_user/file/25206635586.pdf
    • http://speaklifeiamgreatness.com/files/files/97122208091.pdf
    • https://bisleriwheel.genefied.co/ckfinder/userfiles/files/93366174648.pdf
    • https://holocaustresearch.pl/nowy/photo/file/58182479148.pdf
    • http://www.samuitns.com/image/upload/File/tejibetisu.pdf
    • http://talk200.com/admin/admin/uploadfiles/file/jijikebonakirutefiselo.pdf
    • https://cowik.pl/upload/robulomupakar.pdf
    • http://coeb.eu/userfiles/files/zonibi.pdf
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/hml2ibtuka098n0pnt799ugtp8/30544467887.pdf
    • http://hastensandbreakfast.nl/userfiles/file/loruzidamudupexomifupuxuj.pdf
    • http://trip-sale.ru/userfiles/file/sokumokukiwemedapodegi.pdf
    • https://cepatdaftargroup2.com/contents/files/78752297283.pdf
    • http://giorgimpianti.com/userfiles/file/rivogakaw.pdf
    • http://hpcad.pl/Upload/file/fizalizi.pdf
    • https://podgoricki-klub.me/userfiles/file/semasejavuvuzexudemi.pdf
    • http://kledingindex.nl/images/uploads/pafizewigiwoxapajone.pdf
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/1d44f3632d89b0ab6c76a4347ed7ddc6/13045061489.pdf
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/q9hl031b31cg47m8unnq3va4pu/sajiva.pdf
    • http://phuvuongcorp.com/luutru/files/31462548744.pdf
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613eceac2de79---39054972269.pdf
    • http://sanmorales.es/userfiles/files/75600854709.pdf
    • 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_off0000da84.bin
de662f9b7523d0beb07265b34372e57e9a9ade78779940dda9833df671ee8f67
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA84 10568 bytes
font_01_sfnt_off0000f26f.bin
e0f7efbdd86ba8358ac582c4a27fa23478b6ca19626d0fd106b4fc5e9dec5672
pdf-font-stream PDF embedded font (sfnt) at offset 0xF26F 18992 bytes
font_02_sfnt_off00012455.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12455 16792 bytes