Malicious PDF — malware analysis report

Static analysis result for SHA-256 c650846ca10e96f8…

MALICIOUS

PDF

68.4 KB Created: 2021-03-06 11:28:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d0275c74e9476a359a4fa430ee2a5ec3 SHA-1: 57e8b69b4f92f828baee580ae7551a1a8c696287 SHA-256: c650846ca10e96f841eb87a170a6cee1a9a9e5e7c6002541ce1d85cb2d4a27ea
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-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://jottigo.ru/wix?keyword=the+crucible+unit+test+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4484115/normal_6029e83325eed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366637/normal_5fde456f9e3f2.pdfIn PDF document text
    • http://geesecam.com/najazemitelodepodawulajg7uc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418391/normal_5fd91a441f21e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376619/normal_603150e0e89d8.pdfIn PDF document text
    • http://vash-fasad.live/zugesuwafosilinbjd2e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/travel_magazine_template_indesign.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c63c3b5-57bd-41df-a004-e9e49f8e2314/xabim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5b5c1be-18e2-4589-9ef8-5f456166bd99/what_is_the_best_sole_elliptical.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89015c8a-ecb1-4cbc-b1e8-3ba104e1304a/how_much_does_a_tune-up_cost.pdfIn PDF document text
    • http://taxisariwoboduz.epizy.com/braveheart_bagpipe_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c94af11-da71-47a8-9ec0-0408d4105ef2/18346612631.pdfIn PDF document text
    • http://koburolamugalo.rf.gd/former_chp_officer_arrested.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b4e57bc-7640-405c-95d9-8925aca17b9f/what_do_the_8_principles_of_the_data_protection_act_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/2018_movies_hd_tamilrockers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b31dcfd-1f89-4f52-98e8-ee80ef473b22/71904884315.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/baird_smart_tv_manual.pdfIn PDF document text
    • http://dovagoxaluzof.rf.gd/dd_5e_barbarian_subclasses_ranked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebfc4528-8a14-4731-baa3-7d86a4d533b4/53343652979.pdfIn PDF document text
    • http://gelukadusedi.epizy.com/biripovina.pdfIn PDF document text
    • http://danasavej.epizy.com/strategic_management_process_definition.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_off0000cf3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF3E 5068 bytes
SHA-256: 75fe1933d9d5fd39418124a385e6c70497d2807beabef8920ba0a1fab3c0aec7
font_01_sfnt_off0000e085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE085 10468 bytes
SHA-256: 1c66c95aadc622764d4b8f50ec60a24563773c775492e2149c5a34932c6c2cb4

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