Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b68577d360a599e…

MALICIOUS

PDF

70.3 KB Created: 2020-12-24 10:06:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 734480f9b508a2105f1f82a6ab9deb10 SHA-1: 96368a8dcf5c77c417e264bd3d45e0a9572a6480 SHA-256: 1b68577d360a599e9300184d6c1f8e620968760ac74c45799c374dfe94cc274f
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 0.9998

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://trafffe.ru/strik?utm_term=toilet+fill+valve+runs+randomly PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367301/normal_5f89e0a72118c.pdfIn PDF document text
    • https://cdn.sqhk.co/tizarina/icheoec/multiplayer_driving_simulator_mod_apk_all_cars_unlocked.pdfIn PDF document text
    • https://cdn.sqhk.co/niturunajik/ejbjh63/lisigodamutapow.pdfIn PDF document text
    • https://cdn.sqhk.co/zimevegi/1Zphbha/learn_html_and_css_best_book.pdfIn PDF document text
    • https://cdn.sqhk.co/soxemudu/7grsehh/41160482893.pdfIn PDF document text
    • https://cdn.sqhk.co/rosavuzezig/d3Gjhja/28483072677.pdfIn PDF document text
    • https://cdn.sqhk.co/jelivapizivo/dgfNIFT/exorcist_3_streaming.pdfIn PDF document text
    • https://jilarikogezinuv.weebly.com/uploads/1/3/0/9/130969280/2988326.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450732/normal_5fa82da5d23ef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392857/normal_5fc89fe69b4cc.pdfIn PDF document text
    • https://cdn.sqhk.co/lepezusija/7aiiSsx/slot_machine_meaning_in_spanish.pdfIn PDF document text
    • https://cdn.sqhk.co/jozunufap/4sNgjhj/string_of_words_game_cheats.pdfIn PDF document text
    • https://cdn.sqhk.co/samigimas/U4qgUgf/3d_tennis_game_download_for_pc.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/1c8a34f6-4162-4f98-bc9b-ba7519ab5faf/98947738592.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 7

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA67 5048 bytes
SHA-256: b77e24ccb071ea866af42e791734fbf307ca1d600242e75085a91df687c6cda8
font_01_sfnt_off0000db7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7E 10172 bytes
SHA-256: 5bc517dd97f28680e6e42073a70934635a628851b92bf4ae5f95b08dbdab93af
font_02_sfnt_off0000fe12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE12 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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