Malicious PDF — malware analysis report

Static analysis result for SHA-256 f874f0a77b15583d…

MALICIOUS

PDF

74.9 KB Created: 2021-04-02 07:10:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d323bba171dee82e20ddb7aa9b65a162 SHA-1: 0d09563439d683a0d4e760b53bad832deaf8f085 SHA-256: f874f0a77b15583d5949c507cf9fab6833342de14b68c8abc2ed4263a5c42170
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 0.9997

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://resalured.ru/aws?utm_term=halloween+rent+sheet+music PDF link annotation
    • https://cdn.sqhk.co/merojuniv/jcMjcnR/58311524008.pdfIn PDF document text
    • http://jagodaxusix.iblogger.org/56633018545.pdfIn PDF document text
    • https://cdn.sqhk.co/tamoravuwera/fOghXid/dallas_stars_travel_hockey_league_schedule.pdfIn PDF document text
    • https://cdn.sqhk.co/wenewojufaj/ghiijXy/diesel_challenge_pro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481825/normal_602c249ec1e80.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/iihhef5/96373328558.pdfIn PDF document text
    • http://xazusifiwo.iblogger.org/apollo_munich_network_hospital_list_in_delhi.pdfIn PDF document text
    • http://wujaxeniju.22web.org/sugeloduvapekukuduripef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451556/normal_5fe4dab27bf0b.pdfIn PDF document text
    • https://cdn.sqhk.co/jokutevek/SOQM7N9/planet_child_families.pdfIn PDF document text
    • http://xofazonir.iblogger.org/dobefomitosavezegifejom.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/141085e2-973a-4266-be0e-09837da6ea75/93846653753.pdfIn PDF document text
    • http://wuxodevidupibe.epizy.com/raja_babu_bhojpuri_song_ringtone.pdfIn PDF document text
    • http://karuriletepet.epizy.com/dalopebujevef.pdfIn PDF document text
    • http://gudelapomopovu.rf.gd/how_much_does_a_tune_up_cost_at_meineke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ef89f0b-38f9-4ca6-bda0-d77873236da4/bijesaxewanisof.pdfIn PDF document text
    • http://bamonoxo.onlinewebshop.net/apache_solr_indexing_files.pdfIn PDF document text
    • http://najukelosuned.myartsonline.com/99320060271.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0a5d8fa-d685-44f4-ac8c-83de7ecd78d6/tarot_zyx-m_osd_manual.pdfIn PDF document text
    • http://neroxijojin.rf.gd/what_is_a_synonym_for_catch_sight_of.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/930d843f-d0d9-4ef8-99a2-40e74ddeab64/american_red_cross_blood_drive_volunteer.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_off0000e871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE871 5092 bytes
SHA-256: e5581ae69e4629143737e53833ee70943824f31e4ca344949404e97ea6beeb8c
font_01_sfnt_off0000f9a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A4 10768 bytes
SHA-256: bcefe6c4f14c2f5be3a279fe8574555c32e1ba15198099b6f9521b157d9fdfd3

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