Malicious PDF — malware analysis report

Static analysis result for SHA-256 951e9a96036a185d…

MALICIOUS

PDF

68.5 KB Created: 2021-06-11 07:03:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 47efecefe8dc7b3691b72354aeeac136 SHA-1: 4bb77fc2356929e577411eefd674bed28a545d7b SHA-256: 951e9a96036a185df61a5399b82d8b20e412182975a2fc5c4f6287af07e4fe07
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or SEO manipulation tactic. One of the embedded URLs is 'https://synerhu.ru/pbw?utm_term=naruto+shippuden+ultimate+ninja+impact+iso', which is likely intended to redirect the user to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=naruto+shippuden+ultimate+ninja+impact+iso PDF link annotation
    • https://funiwulew.weebly.com/uploads/1/3/2/8/132814073/5666c59b13dc2ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490367/normal_6019b50a16c3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450723/normal_60bb79b59a342.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472753/normal_600f507a6ed20.pdfIn PDF document text
    • https://pobifixakije.weebly.com/uploads/1/3/4/4/134445477/pozila-pujep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409806/normal_606258c85d60c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405922/normal_6003edcd62ba0.pdfIn PDF document text
    • https://xonofuri.weebly.com/uploads/1/3/4/7/134706076/5235548.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402244/normal_605c76e7dfa18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374700/normal_602ef5a01417d.pdfIn PDF document text
    • https://dajurejew.weebly.com/uploads/1/3/4/7/134753869/11205729.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/e526d075-8f12-4998-a2a1-660e91c4714a/pablo_neruda_100_love_sonnets_in_english.pdfIn PDF document text
    • http://guxofesam.pbworks.com/w/file/fetch/144896430/mr_blue_sky_piano.pdfIn PDF document text
    • http://murenet.pbworks.com/f/56031793378.pdfIn PDF document text
    • http://furalagaposu.pbworks.com/w/file/fetch/144674172/plc_siemens_s7-200_cpu_224.pdfIn PDF document text
    • http://febokipup.pbworks.com/w/file/fetch/144792636/benujidelugutarujekam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d21622a2-3878-408d-a6c5-4aa55804fe46/33264902128.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e6d86c6-f377-480a-82e8-6d1fbfbafd47/jagedexibu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25dc6658-1464-42e7-8a38-4827dbeec1f5/kuwabe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45bc1660-2d8d-4ea9-9afc-7fb775dd8381/tobagikejuzibujapedonawal.pdfIn PDF document text
    • http://werinenimuta.pbworks.com/w/file/fetch/144628626/usa_studies_weekly_week_7_crossword_answers.pdfIn PDF document text
    • http://midevodimu.pbworks.com/f/ip_address_lookup_by_phone_number_free.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_off0000d026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD026 5360 bytes
SHA-256: 0eb7b6a62b5a1f9de12e57860a1fdfb64ff5e9dd5c5acc420ee7226769298454
font_01_sfnt_off0000e23a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE23A 9972 bytes
SHA-256: 72701c2e203ba83daecaa9ec4335a88ef82d74af08101c62e6fb7bb86466b6b5