Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a4e3bcc3ab1df1d…

MALICIOUS

PDF

69.0 KB Created: 2021-06-02 22:39:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: cceccc0c04d5c77d226aa2f9e5a8a8bf SHA-1: 9d6c791ae2f7a3cdb9d4244264a51e233402e6a7 SHA-256: 4a4e3bcc3ab1df1d09db999917c3d5159a1ae0a4fc2ec72b9471cbeb68443255
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The presence of a specific search term ('film my stupid boss 2 indoxxi') indicates a lure to attract users to potentially malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

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://synerhu.ru/pbw?utm_term=film+my+stupid+boss+2+indoxxi PDF link annotation
    • https://giligigava.weebly.com/uploads/1/3/4/4/134494785/8833140.pdfIn PDF document text
    • https://miwefotuwid.weebly.com/uploads/1/3/0/9/130969826/8225ef7d.pdfIn PDF document text
    • https://lefitujeledezov.weebly.com/uploads/1/3/6/0/136028835/60ade51.pdfIn PDF document text
    • https://magijomolalol.weebly.com/uploads/1/3/1/4/131437319/voviguduse-zutate.pdfIn PDF document text
    • https://xinefozi.weebly.com/uploads/1/3/0/7/130775465/7987405.pdfIn PDF document text
    • https://kixatefibav.weebly.com/uploads/1/3/0/7/130776592/5291298.pdfIn PDF document text
    • https://tedinuvade.weebly.com/uploads/1/3/4/3/134348171/vewuboruzagimajimego.pdfIn PDF document text
    • https://boxatikavizag.weebly.com/uploads/1/3/4/6/134680825/sobezazidedopag_vuwulujen_lasekexon_jobimigax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469633/normal_604d2ca154c06.pdfIn PDF document text
    • https://tuzakipimuvujuv.weebly.com/uploads/1/3/0/8/130813756/0799333dafb7.pdfIn PDF document text
    • https://jatowuwovusi.weebly.com/uploads/1/3/5/9/135981640/25da65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420037/normal_604af2007a3d2.pdfIn PDF document text
    • https://dekoreriso.weebly.com/uploads/1/3/7/5/137501726/4659b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xojifot.pbworks.com/w/file/fetch/144426618/is_foggy_brain_a_symptom_of_covid_vaccine.pdfIn PDF document text
    • http://mefijunov.pbworks.com/w/file/fetch/144419436/35090846562.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c37e328-9530-4545-9328-1c5f9abba73f/how_to_use_interdynamics_ez_chill.pdfIn PDF document text
    • http://kirozatijawu.pbworks.com/f/zokutononene.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce2a1559-8529-408e-a2db-b4d4f609c272/57623543833.pdfIn PDF document text
    • http://mogulobobis.pbworks.com/w/file/fetch/144513831/spanish_grammar_exercises.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD303 5196 bytes
SHA-256: 17b11449e403f087611f05fed780bb6735b4a27a20b46397d5b0c47d4764d278
font_01_sfnt_off0000e4ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AD 10032 bytes
SHA-256: f69282ed1c3d947204c123d5a5f0d81cc696c993d7f348e9dbc961341c0b24a0

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