Malicious PDF — malware analysis report

Static analysis result for SHA-256 38a1fc2a316dfc1a…

MALICIOUS

PDF

76.7 KB Created: 2021-05-07 09:00:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e7e6d25f16c0978bdfb08076db94db99 SHA-1: 554c505113223ee02d6f0ba2557c1183e6985c84 SHA-256: 38a1fc2a316dfc1a0cbd20966ef2e923a40629abde7958dfe240e5437eac96a8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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 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://lozipotod.ru/strik?utm_term=cobra+29+lx+cb+radio+mods PDF link annotation
    • https://rulesamafov.weebly.com/uploads/1/3/4/7/134768786/fibixodudufulop.pdfIn PDF document text
    • https://rofobanajogano.weebly.com/uploads/1/3/1/1/131164113/beae95b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390641/normal_5feebfd6b73da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426257/normal_60514ae21660b.pdfIn PDF document text
    • https://cdn.sqhk.co/miburixegapu/eIjhxdS/91100798992.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378618/normal_603801abbd9db.pdfIn PDF document text
    • https://cdn.sqhk.co/popuzanuguw/eghJhii/hard_pencil_case_walmart.pdfIn PDF document text
    • https://cdn.sqhk.co/tezuzerise/xjifgdv/knights_charge_brawl_deck_upgrade.pdfIn PDF document text
    • https://dizodedijep.weebly.com/uploads/1/3/5/3/135391654/fosezaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403271/normal_5fd6414363d38.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kowewewabozete.epizy.com/american_brawler_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/56078366208.pdfIn PDF document text
    • http://zerowedepuwetif.epizy.com/chac_mool_analisis.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/52723493136.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/101f953f-cd53-41d6-8b82-c13a0aaf5cbc/how_many_pages_long_is_les_miserables.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/229c0ed2-fd58-4a55-942c-cf854887e413/zijatofebonokexe.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/84126793435.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e94d19e-733a-439b-8f72-8d00b8c982e2/71030485119.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/94045069759.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/almost_there_piano_sheet_music_easy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35df1355-8adf-4a03-b5e4-f42ae88d885e/how_to_use_salesforce_lightning.pdfIn PDF document text
    • http://rusuxagek.rf.gd/java_update_8_161.pdfIn PDF document text
    • http://miseparasunafit.rf.gd/the_stranger_albert_camus_chapter_summary.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_off0000efb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB2 5488 bytes
SHA-256: f4c2607dd1660b9970c0e951f5d9fa09faf2e3afed100298b81ec7951649e9e3
font_01_sfnt_off00010234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10234 10292 bytes
SHA-256: 64b505626d439d4dc961fff1490d66e9d81aa34b8f21cee5a10d603fd561b232

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