Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ab82b4073d38d53…

MALICIOUS

PDF

74.6 KB Created: 2021-02-17 07:56:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6b87dcf59f9c3c1999010acc43b1f566 SHA-1: 2335b17b60e529c0b4503b8daa8d64034e8d3ce6 SHA-256: 8ab82b4073d38d539ea9a241f8ce08bf882bebfe3535aaac7d16d69753d2ec9c
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, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The embedded URLs, such as 'https://maypoin.ru/123?utm_term=what+are+the+four+types+of+organisational+culture+according+to+handy', are designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 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://maypoin.ru/123?utm_term=what+are+the+four+types+of+organisational+culture+according+to+handy PDF link annotation
    • https://pinobuni.weebly.com/uploads/1/3/0/9/130969003/6661224.pdfIn PDF document text
    • https://jovinafunen.weebly.com/uploads/1/3/2/6/132695325/c9073.pdfIn PDF document text
    • https://namosozevo.weebly.com/uploads/1/3/0/9/130969937/8951595.pdfIn PDF document text
    • https://lebudikex.weebly.com/uploads/1/3/5/3/135310552/wugibupamisosaval.pdfIn PDF document text
    • https://vepibasizux.weebly.com/uploads/1/3/1/3/131380915/7362993.pdfIn PDF document text
    • https://pilewamef.weebly.com/uploads/1/3/4/8/134849526/6355849.pdfIn PDF document text
    • https://sosanibizug.weebly.com/uploads/1/3/2/6/132695556/gozilux.pdfIn PDF document text
    • https://bogekivusuwi.weebly.com/uploads/1/3/4/6/134604255/vizose_vabiwomononax.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/fakimefemeberurewupe.pdfIn PDF document text
    • https://vezefujofebiv.weebly.com/uploads/1/3/5/3/135304234/7915906.pdfIn PDF document text
    • https://sebinegovana.weebly.com/uploads/1/3/4/0/134095930/5459881.pdfIn PDF document text
    • https://zejafopo.weebly.com/uploads/1/3/4/5/134505046/469f7b02044ab8.pdfIn PDF document text
    • https://fobaripiso.weebly.com/uploads/1/3/4/4/134443650/7bdd2c8346.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nusilemil.epizy.com/employee_personal_details_form_template_south_africa.pdfIn PDF document text
    • http://jagogapibibolin.epizy.com/dragon_ball_super_fighting_games.pdfIn PDF document text
    • http://duvufewitopemaw.rf.gd/gym_training_log_template.pdfIn PDF document text
    • http://xuwuxubemepimox.rf.gd/property_sale_agreement_format_in_tamil.pdfIn PDF document text
    • http://gesinofafag.epizy.com/tiwofevesimagegen.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_off0000e671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE671 5532 bytes
SHA-256: 8ae8c3545729f08c2068ad2163bd3fec1694cb1b5101c2e6d48ff6889d4f54fa
font_01_sfnt_off0000f956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF956 10380 bytes
SHA-256: b06bf246c3feb7dddcefa8058f80a5572af8cc90ce809cbfcf83a6d3fd4c7828

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