Malicious PDF — malware analysis report

Static analysis result for SHA-256 40c6918b710e1dee…

MALICIOUS

PDF

86.1 KB Created: 2021-04-04 11:11:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 5e0885f1f2133f3ef8569ed68cfa77c6 SHA-1: 5dee256b33149784572516c97da72612151f910b SHA-256: 40c6918b710e1deef3f55d30398008ebfa2e7235174b86e0c9fdb976106228ab
134 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting services, and a heuristic identified it as a link farm designed for SEO manipulation. The document body, though heavily obfuscated, suggests a lure related to a "Canon eos t3i manual pdf", likely to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jumiwimov.ru/award?keyword=canon+eos+t3i+manual+pdf PDF link annotation
    • https://bofejaximolapob.weebly.com/uploads/1/3/4/7/134751884/6c02c7a.pdfIn PDF document text
    • https://refapolujagosax.weebly.com/uploads/1/3/4/8/134896756/rogiviv-zavijonebofat-fimivojonipifex.pdfIn PDF document text
    • https://xolijusir.weebly.com/uploads/1/3/4/0/134016651/1ff36e1c5b4.pdfIn PDF document text
    • https://rajikaluniker.weebly.com/uploads/1/3/1/3/131383998/rojifafu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://razujefipuwix.rf.gd/wofarutujepo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d20393c5-c603-44b9-a8f8-18d595b2ac66/popupevijijapexido.pdfIn PDF document text
    • http://wuseruri.rf.gd/ielts_simon.pdfIn PDF document text
    • http://foxinojale.epizy.com/42122024301.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/25332916000.pdfIn PDF document text
    • http://visifisaduz.rf.gd/diferuseju.pdfIn PDF document text
    • http://tuxipagixeti.epizy.com/83550758808.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/21003892673.pdfIn PDF document text
    • http://radepurot.epizy.com/how_to_train_for_football_at_home.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/resumen_de_la_pelicula_el_mundo_de_sofia.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/lyrics_of_i_dont_care_by_ed_sheeran_and_justin_bieber.pdfIn PDF document text
    • http://kesuzidadubitik.rf.gd/mahalaxmi_september_2020_marathi_calendar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbe35658-af99-471d-ae4f-9d4b19e38a8b/how_to_reset_a_winbook_tablet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001065f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065F 5160 bytes
SHA-256: 01c07052b41c5dccd874ce5636cadb23da158ff723e5ef8e369e5413186cbfa6
font_01_sfnt_off000117da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117DA 10932 bytes
SHA-256: ed6166f19257ec35d86acbd981d765b111b486ea8aad143367b7dc530c6061b8
font_02_sfnt_off00013d13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D13 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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