Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f2667f75c8195dd…

MALICIOUS

PDF

82.9 KB Created: 2021-03-24 09:51:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c93ce14855b0e340e920513bde7903e3 SHA-1: b87f2f87950c11480dc4f915be51da25de41df67 SHA-256: 1f2667f75c8195dd0e45d868ebeb8be1db38a52a845e818baa818c8e5e6abfc3
224 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • 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://yafferge.ru/wix?keyword=rational+combi+oven+manual In PDF document text
    • https://cdn.sqhk.co/fipimomozuk/aqf2jib/soccer_manager_worlds.pdfIn PDF document text
    • https://cdn.sqhk.co/sosobita/b5micgf/zodizafutaliroturefawu.pdfIn PDF document text
    • http://vugezaselefobop.iblogger.org/chronicle_of_a_death_foretold_chapter_3_literary_devices.pdfIn PDF document text
    • https://cdn.sqhk.co/sabiseleto/MhbxMia/cute_kitty_wallpaper_desktop.pdfIn PDF document text
    • http://bakimebisuxoj.iblogger.org/riesgos_biologicos_laborales.pdfIn PDF document text
    • http://xezobofelupazat.22web.org/restating_the_question_worksheet.pdfIn PDF document text
    • http://pimegaxonubaz.22web.org/hoover_windtunnel_vacuum_attachments.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479441/normal_5ff70db85b5f4.pdfIn PDF document text
    • https://cdn.sqhk.co/vipikunowi/eGYifij/hitman_paris_sniper_assassin_master.pdfIn PDF document text
    • http://pejofewetoz.22web.org/enterprise_4_coursebook_intermediate_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421466/normal_5fd67102e731a.pdfIn PDF document text
    • http://nixuvukoda.iblogger.org/bumblebee_transformer_67_camaro.pdfIn PDF document text
    • https://cdn.sqhk.co/furigelo/SDcjijh/98797479784.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://revipopeguxasaf.epizy.com/zulax.pdfIn PDF document text
    • http://rofogaxadu.epizy.com/lowazerituliwirizosu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d77cd07-b3f8-4cec-9cf0-d459e9538feb/xudonijimumosewor.pdfIn PDF document text
    • http://favugilodufim.epizy.com/konsep_agama_islam.pdfIn PDF document text
    • http://rusireges.epizy.com/password_manager_android_and_ios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f1b0399-18f6-49c5-b162-248575354f8a/38980736429.pdfIn PDF document text
    • http://kitojob.epizy.com/29508091983.pdfIn PDF document text
    • http://sofikej.rf.gd/how_to_charge_eco_drive_citizen_watch.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_off00010526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10526 4880 bytes
SHA-256: 29f1b7f918909a25665f28399403b8c5b7ef39a941c818d33013bc1cf1a83ae3
font_01_sfnt_off000115bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115BB 11712 bytes
SHA-256: f24d39745c1e1e8c2f53428a00d51f1f2ee361ef9c06b81d7cb0dca2c7bfc046

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