Malicious PDF — malware analysis report

Static analysis result for SHA-256 79947fc8ab0a4fc9…

MALICIOUS

PDF

81.3 KB Created: 2021-03-22 07:43:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: caa32ea75321a7b7529cd50990a519e4 SHA-1: 11de6fe5a0edf40fd39fcdf4b3b84e6d1900c7a8 SHA-256: 79947fc8ab0a4fc9bacb3fd195efd4c3ad3490263255c59a6104401c9576c312
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://golowaki.ru/strik?utm_term=excell+xr2500+pressure+washer+pump+replacement PDF link annotation
    • http://vakiduweg.mygamesonline.org/english_lessons_for_spanish_speakers.pdfIn PDF document text
    • http://nibajafij.medianewsonline.com/fixetogokuwoninutop.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/gciihgY/luzelak.pdfIn PDF document text
    • https://cdn.sqhk.co/jakofawesavo/Mdkmjbn/manusia_makhluk_sosial.pdfIn PDF document text
    • https://cdn.sqhk.co/roretuduva/Rz4hbjf/vegas_world_free_slots_on_facebook.pdfIn PDF document text
    • https://cdn.sqhk.co/tobizopowebo/8Byhaij/sesubarazu.pdfIn PDF document text
    • https://cdn.sqhk.co/jumifokujuje/giihKgf/417368405.pdfIn PDF document text
    • https://cdn.sqhk.co/dufelogaruf/Q9tjcyg/checking_account_balance_prank_phone_number.pdfIn PDF document text
    • https://cdn.sqhk.co/gusisitixinu/QigRjfJ/stickman_ninja_warrior_providence.pdfIn PDF document text
    • http://basidugom.mygamesonline.org/tusapolitepedixu.pdfIn PDF document text
    • http://pirewarekow.mywebcommunity.org/47186782269.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/2389decd-bd68-456a-9173-c62c56be7ed1/virekakovoxobovamuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cabc3cf-7ab5-4907-a661-acabd1adbf1b/charlie_and_the_chocolate_factory_original_soundtrack.pdfIn PDF document text
    • https://6376acfe-5884-4251-b3d5-19a03c044549.filesusr.com/ugd/de3d83_1278da356ad14bb4a0fedd46375fd187.pdf?index=trueIn PDF document text
    • https://7f06b679-e14d-4525-8955-d56a7cf6f710.filesusr.com/ugd/79e5df_c42865d6994246b6a40dd25f12508bb6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdc8de77-eb0c-427f-a221-795344ac36a4/gawexosaburerafidikuvu.pdfIn PDF document text
    • https://11f44e1d-c86f-4be6-baa1-90970e7c24f5.filesusr.com/ugd/a298ce_bc542568e6464d23a71034621e26431c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/003cf90b-ffbb-48c5-923e-66be5bb359af/crochet_blanket_for_beginners_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa9aa3c5-1650-4b6f-ab7d-76cdb55a89d5/4835172928.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/640d0995-a437-468c-9bb7-645b46d84b1d/action_verbs_worksheet_2nd_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e60fb36f-1c9e-449b-83bf-21c5e5d4fb4a/does_walmart_sell_nook_chargers.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF02 5688 bytes
SHA-256: 8393563b4d310547d999a55069b1ba3e89dbaaa23ae85b7d9a9f0a0c8bd4d141
font_01_sfnt_off0001124b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1124B 11168 bytes
SHA-256: 233f1d7a764f95daeeff6b729bd17a51e1031412bee78cdfb6388ad0a6564547

Open this report in the interactive analyzer, or submit your own file for analysis.