Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ed344c9e4d24374…

MALICIOUS

PDF

81.2 KB Created: 2021-05-27 06:41:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b972082e5f5d73543fc9d97995f6b46d SHA-1: 71cb2c2a18e225f9f85433bc5bc54e35deed5078 SHA-256: 5ed344c9e4d243740f29aa9e91545e4ef25856e350b60f0d7e5c7076548b02ab
156 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. 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dafemum.ru/strik?utm_term=how+to+start+a+raffia+basket PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4479932/normal_6005ae9d57908.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470967/normal_6052a999915c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427282/normal_5ff042f52539c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403266/normal_5fca3e7732e28.pdfIn PDF document text
    • https://beripetalodewug.weebly.com/uploads/1/3/4/8/134865824/mugowagovixete.pdfIn PDF document text
    • https://turomanusogagi.weebly.com/uploads/1/3/1/4/131453559/16c62b9c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454575/normal_5fe5d0dc18e51.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/13564565-bd83-47da-9c27-0462cf5b0a99/59829823459.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19bfca21-a459-480f-8b63-a39b2df926e9/why_is_my_hp_deskjet_2600_printing_blank_pages.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8c52092-3045-461e-bb77-a808295b613f/how_to_pair_my_blackweb_bluetooth_headphones.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffe3f564-aa3a-4845-8f08-2b98139d1282/how_to_create_drum_patterns.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d75da325-78c5-47e5-80e0-c631a88a3f7b/31837700176.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba831d7a-3ddf-43dd-984f-e4c9aa4cdec8/vawov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcb49aa3-5545-4c63-878c-aac74db2eaff/duzav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff9322e7-6f1e-4564-a2d2-ccdf1af17281/what_is_a_marlin_336.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5aa1004c-c15a-4b7c-a9ac-17684f12415c/the_book_of_birthdays_june_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b58b7ae-5a5b-45ce-a320-a685756e04db/toro_timecutter_ss4200_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/011bc6f2-7c1a-4140-a143-5a2099d72ae3/philips_shaver_9000_head_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ab0c83d-e0db-4752-be25-a0b58dce05a4/67398498296.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fde61f7e-e14e-4c13-b1a3-ff18d8a1eb6e/microsoft_flight_sim_xbox_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd70152e-bdb6-421e-8ce0-4fb855ae765e/essentials_of_biostatistics_in_public_health.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_off0001009c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1009C 4984 bytes
SHA-256: 3c019564feac8fd3032060dc643faed89bd094ec4b6fdcb8ddf82aaea1313a4e
font_01_sfnt_off000111b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B2 10688 bytes
SHA-256: 05714bec7b240f530baef262d4141364ae2f42626c9b353dedfa6b9bdd525c0b

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