Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f5d1560ff2f499a…

MALICIOUS

PDF

78.4 KB Created: 2021-04-08 03:00:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d19483f7b6ea5bab159119d95d6efc66 SHA-1: 8ee19a2ed1d6527156c7fa473485624266fb1d42 SHA-256: 2f5d1560ff2f499a2bb07642e1e1826b6ab6778c7273a90f490d7991a4c9bbf0
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/123?utm_term=binary+mlm+calculator+free PDF link annotation
    • https://cdn.sqhk.co/rexixugepir/cjbJWhi/jumekapoxakefilakido.pdfIn PDF document text
    • https://cdn.sqhk.co/zamokaxu/hgiDjhL/domino_s_pizza_village_road.pdfIn PDF document text
    • http://pirewixuzejetin.iblogger.org/runoxivo.pdfIn PDF document text
    • https://cdn.sqhk.co/dadirowuj/jbji6bc/are_face_masks_required_by_law_in_pennsylvania.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505326/normal_5ff0ed95ee348.pdfIn PDF document text
    • https://cdn.sqhk.co/foseziwate/hjX1hcM/64055552036.pdfIn PDF document text
    • https://cdn.sqhk.co/nowavutu/jbf5zhd/73106639418.pdfIn PDF document text
    • http://selizixid.iblogger.org/understanding_pathophysiology_3rd_edition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475572/normal_601bc1783ede3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393483/normal_5fe81c71292cc.pdfIn PDF document text
    • https://cdn.sqhk.co/vafegijateno/vZIiehi/vokiloxanavesaze.pdfIn PDF document text
    • https://cdn.sqhk.co/fijiwomeza/hhXYELG/eclipse_plugin_java_decompiler_free.pdfIn PDF document text
    • https://cdn.sqhk.co/jawosuzexe/DXjjiel/togekexenefuz.pdfIn PDF document text
    • https://cdn.sqhk.co/gujipiror/jcBVUm7/traffic_rider_2020_apk.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
    • https://uploads.strikinglycdn.com/files/3c4a3bd2-5aa2-4af4-ac31-d850c46ab2b8/tovinazefibutiwidi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39ec0aab-328b-4ad2-ba85-6d57269f1bb8/how_to_install_insteon_dimmer_switch.pdfIn PDF document text
    • http://weralawubuzeg.epizy.com/aarum_kaanathe_song_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3e52705-a289-41be-95ae-331760efc379/41811814030.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6eb611e-b953-45f0-b97f-bc18a5a9bf41/tusozesidodod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cae4c5a-5027-4970-9fb0-75b908f47135/28300147186.pdfIn PDF document text
    • http://xedovafimolodem.epizy.com/zotinigufenowutu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ed7cbfe-27d2-4026-8df0-40356dc7bf44/what_is_meant_by_an_inclusive_curriculum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c46a30e-27b4-4249-81c3-70417b5bf860/58989001662.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_off0000e876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE876 4884 bytes
SHA-256: 11ec40b4bbd271a8d9600a794816931cbf2f708c3acc6cec83340e1701f8a76d
font_01_sfnt_off0000f8ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8ED 10860 bytes
SHA-256: c7bb0ee41a2025182022c3cb895065a1ba89fdcc9b7253281b6c3dc0d99f24fc
font_02_sfnt_off00011ddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DDC 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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