Malicious PDF — malware analysis report

Static analysis result for SHA-256 69214b1b047623dd…

MALICIOUS

PDF

72.8 KB Created: 2021-01-17 05:18:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0266763ef6facebc7d2910172170bca5 SHA-1: 158106fc88b20217ec983336d052ee2590711b93 SHA-256: 69214b1b047623dd849655197348a438aaea0c421c4e717a4056904c9fe23c73
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a tactic to drive traffic to potentially malicious or phishing sites. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a phishing or malicious redirection attack pattern.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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/123?utm_term=how+to+spell+favorite+in+cursive In PDF document text
    • https://wuwuxetu.weebly.com/uploads/1/3/4/8/134897280/8901747.pdfIn PDF document text
    • https://site-1173132.mozfiles.com/files/1173132/ios_8_for_iphone_6.pdfIn PDF document text
    • https://guxojifupu.weebly.com/uploads/1/3/1/4/131438233/2401651.pdfIn PDF document text
    • https://vakigosem.weebly.com/uploads/1/3/4/4/134480352/7485709.pdfIn PDF document text
    • https://rulovuwupe.weebly.com/uploads/1/3/5/3/135386045/d8ce2de32.pdfIn PDF document text
    • https://sivipafegedijog.weebly.com/uploads/1/3/4/4/134443607/1909075.pdfIn PDF document text
    • https://site-1254658.mozfiles.com/files/1254658/80316398484.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/PjfbHhc/audio_books_love_stories_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/samumosoxivi/fhiiaLV/71108466976.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/mexesazaxasa/bird_singing_sound_effect_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/sidadawuxevoxarenu.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/video_player_app_for_android_best.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/crystal_ball_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/76031398509.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/guwanelopar.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_off0000dffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFFA 5120 bytes
SHA-256: 3631712cb9671f2dc8fd18acbd16d3dbb2c9ba61d4ac4379913560221de2634f
font_01_sfnt_off0000f191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF191 10748 bytes
SHA-256: 2b9931868c0c8f542e0870940fe4dce4143c630477b3c32e29e5dfdeec7b3f7a

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