Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c288674da7e2a9f…

MALICIOUS

PDF

78.8 KB Created: 2021-02-18 14:50:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 52147d6255a985763de966b2a32a77b4 SHA-1: 96c118f18b1fa9f578adaa8977d409294fe3120f SHA-256: 2c288674da7e2a9fe203949e0e57b55e5cbfc073414fb9879c2cf9fce050bb45
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file was flagged by multiple heuristics as a link farm, with a critical alert for a mass external PDF link farm on disposable hosting. The ClamAV detection and ML classifier further indicate malicious intent, likely related to phishing or malware distribution. The embedded URLs point to various domains, suggesting an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://bologen.ru/wix?keyword=ddo+combat+expertise PDF link annotation
    • https://puzepoxa.weebly.com/uploads/1/3/4/3/134318678/7293763.pdfIn PDF document text
    • https://cdn.sqhk.co/jokalirubore/ihjavhh/tower_defender_mod_apk_free_download.pdfIn PDF document text
    • https://xijeruwenuvu.weebly.com/uploads/1/3/4/0/134018409/65f2a53f2.pdfIn PDF document text
    • https://cdn.sqhk.co/xamozafi/IJqZghk/79049020084.pdfIn PDF document text
    • https://cdn.sqhk.co/wiradimabid/gdloicE/33466548799.pdfIn PDF document text
    • https://pakujefaf.weebly.com/uploads/1/3/0/7/130740244/vefowaweje.pdfIn PDF document text
    • http://goodnatural.space/sonic_flash_game_unblockedow1pw.pdfIn PDF document text
    • https://cdn.sqhk.co/torixugajo/jhiiggX/94690356589.pdfIn PDF document text
    • http://tryne.xyz/dinosaur_birthday_sheet_cake_ideasf5lea.pdfIn PDF document text
    • https://cdn.sqhk.co/pirasemofoge/x8iefb6/81070451952.pdfIn PDF document text
    • http://sparzha.club/boss_tuner_for_iosxwa74.pdfIn PDF document text
    • https://bekajujoxofutit.weebly.com/uploads/1/3/1/4/131406668/28a6b8f1.pdfIn PDF document text
    • https://cdn.sqhk.co/noviraxat/YheKoIC/rolling_ball_game_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/vixukose/jEjghjb/54157030480.pdfIn PDF document text
    • https://cdn.sqhk.co/remezebona/czlJlNO/tetris_99_dlc_review.pdfIn PDF document text
    • https://butusokusumowa.weebly.com/uploads/1/3/5/2/135294155/wosalimixapo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f91f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF91F 5392 bytes
SHA-256: 70ad1533aad100064db73601162836f9e7b6013dcaf5044f911216183d57a3ac
font_01_sfnt_off00010b5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B5B 10248 bytes
SHA-256: 68318d1ffd0e8f6ae38bc8654df61e4d3bfeb43e6457b613913cdffca9b83662

Open this report in the interactive analyzer, or submit your own file for analysis.