Malicious PDF — malware analysis report

Static analysis result for SHA-256 2583a503d88557b3…

MALICIOUS

PDF

118.2 KB Created: 2021-03-04 23:14:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 056af260516f412473ccec07a2306b38 SHA-1: 64e156719a3b673e358f46e61e7ffedff7e12d04 SHA-256: 2583a503d88557b3b83c12302b8d2b659b72355d25e7291fa3451331fb7e0aaf
194 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting it is part of a link farm or SEO spam campaign. The document body, though heavily obfuscated, contains references to '2020 football scores' and is associated with a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of external URIs and the ML classifier's high confidence score indicate a malicious intent, likely to redirect users to phishing or malware sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://botokaw.ru/123?utm_term=2020+football+scores PDF link annotation
    • https://zavebunerug.weebly.com/uploads/1/3/4/3/134358754/rigipirel.pdfIn PDF document text
    • https://lepopitiw.weebly.com/uploads/1/3/4/7/134762721/1ed898.pdfIn PDF document text
    • https://cdn.sqhk.co/wodigajamu/Mic37UB/cute_ninja_girl_adventure_free_games.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370307/normal_600d8eef4d79c.pdfIn PDF document text
    • https://nonovobuzodeku.weebly.com/uploads/1/3/5/3/135348203/bowidisif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446379/normal_5fc99d756e216.pdfIn PDF document text
    • https://dukopovofozevi.weebly.com/uploads/1/3/5/2/135295758/28a38677c37b251.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405642/normal_5fe1b5f682132.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/gihcphj/kodent_dental_lab.pdfIn PDF document text
    • https://vafukomoruf.weebly.com/uploads/1/3/4/8/134862603/da7e29.pdfIn PDF document text
    • https://cdn.sqhk.co/fiwujumejuf/tjiDN9Q/pizza_hut_medium_hand_tossed_cheese_pizza_calories.pdfIn PDF document text
    • https://tuwuribo.weebly.com/uploads/1/3/6/0/136027226/gegaradelisizaj-perabipukexoza-wadebositigifi-kopazilogu.pdfIn PDF document text
    • https://finijigif.weebly.com/uploads/1/3/2/6/132681422/wevobubobeputomame.pdfIn PDF document text
    • http://rikuluxolavasig.iblogger.org/planificacion_estrategica_de_recursos_humanos_definicion.pdfIn PDF document text
    • https://tiguziriwisil.weebly.com/uploads/1/3/1/0/131071210/38fed8b0c72203f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c0b93aa-63c0-43e9-a124-c46acb03ece4/64430249641.pdfIn PDF document text
    • http://ramawotinejog.epizy.com/94056625498.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54e91b80-a129-414d-b1b1-3b2cc9d214e1/how_long_can_prius_go_between_oil_changes.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_off00018ff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18FF2 5196 bytes
SHA-256: 12c530a7da3ce7ceb2fa200811b02399350333e95fa6aa70e37cfcf87d8ff493
font_01_sfnt_off0001a1a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A1A3 12952 bytes
SHA-256: 461750ccf78e3307b84e523728ebbe08c5074a36a60f48c637d437e77c3ab547