Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7f4051db8794ba0…

MALICIOUS

PDF

64.4 KB Created: 2020-12-06 21:14:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f3272d1ebbd8dd82a4b7e1d751e3dd8d SHA-1: 04558976cf2a8372350982083846fd354d2c9660 SHA-256: a7f4051db8794ba0927842f44281affc78b5dadd61de40c74047c688effc42b6
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting a link farm or phishing attempt, with one prominent URL leading to 'traffine.ru'. The document body, though heavily obfuscated, appears to be a lure related to an "Ar 10 bore guide". No scripts were extracted, but the presence of numerous external links points towards a phishing or redirection attack.

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://traffine.ru/strik?utm_term=ar+10+bore+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379971/normal_5f962fb0b2969.pdfIn PDF document text
    • https://deremorukoj.weebly.com/uploads/1/3/4/4/134490203/xabedusa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419644/normal_5fbf267c5e75e.pdfIn PDF document text
    • https://patodenum.weebly.com/uploads/1/3/4/6/134657208/xepibekafema-ruxugo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc10d7a9955c744b53c6b10/t/5fc51f01a97599144e9cba5a/1606754050337/bunitafeziluvijivijud.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1138816f6d44b07bfcb5c/t/5fc1cd5661e25426e17aab5c/1606536535088/ipod_instruction_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2b9942e537a05ef14dfe3/t/5fc427bb7acac6192a43f2be/1606690748218/vosogivopifofokuzo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5343b239b0722914d6867/t/5fc6a927645712565427658d/1606854952023/dilitig.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd2cd324eb4b4552af80ad/1606233300101/74685767980.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5355c24b06a7eb31bb18b/t/5fca11d2fedaa13a4869140a/1607078356808/physics_toolbox_sensor_suite_pro_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5481f70d-3061-490b-8018-371129542477/nomigabojuruvus.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffb205e8e827d4288adb3/t/5fc23f0da97599144e41783d/1606565646648/most_annoying_songs_roblox_id.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2f9c4116eb00e3c598670/t/5fcc0478eb18547f4b70769e/1607206010994/ombre_nails_blue_and_gold.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc79bd703f04e270fe5856d/t/5fcb74627ab0f364abac7954/1607169123694/nature_cats_great_outdoors.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40ac4d6d-b6a3-450e-8f3f-7bb7f21c8e74/rinutumasopi.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_off0000c144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC144 4896 bytes
SHA-256: 62fab834c842f5059328f5cde98f95d15f779ef894c005f0e96c3e6c4609d6cb
font_01_sfnt_off0000d1ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1FF 10348 bytes
SHA-256: 875cdb8dc7f13db3cb3835f87b1dfbf132d5cb85534e8188a317743c027ac04d

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