Malicious PDF — malware analysis report

Static analysis result for SHA-256 06aec57da20ea0ce…

MALICIOUS

PDF

69.9 KB Created: 2020-11-10 00:07:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 24283472a44f8e01b6c8227d058b9273 SHA-1: d99df8da885e2df5a72f56d552e1ccefd96da767 SHA-256: 06aec57da20ea0ce64694322a7a13c441b0a0487d9c48b9ee758b6aacd808b57
214 Risk Score

Malware Insights

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

The PDF contains a link to 'traffine.ru' which is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to contain text related to game hacking, likely a lure to entice users to click the malicious link. The presence of numerous external PDF links, many pointing to S3 buckets, suggests a link farm or SEO poisoning tactic to distribute malicious content. ClamAV also detected this file as a phishing trojan.

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/wb?keyword=how%20to%20create%20your%20own%20pixel%20car%20racer%20hack In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384483/normal_5f92d9ec03d53.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/3722212.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371509/normal_5f8cc1016c291.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/gulapore/25966193846.pdfIn PDF document text
    • https://s3.amazonaws.com/kalufizefem/uc_browser_download_apk_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/kidukibikizupasaxodow.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/sokuwadivan.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/penn_plax_cascade_700_gph_canister_filter.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/online_java_tutorial_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/beckett_basketball_card_price_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/iron_druid_chronicles_book_1.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/fusorozejimumiz.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/mukumizokuzikewepimo.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/personal_guarantee_template_uk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/spider_man_comics_free_download.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_off0000d1a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1A5 5132 bytes
SHA-256: 544feef834455cf3380924b102a603d5cd083f24baa0cb4d1452f3d06173a568
font_01_sfnt_off0000e327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE327 10924 bytes
SHA-256: fcba5cd8c5bb4a9697333e7363bf722b65bc0f63dfc80472d31386d48441a5e9

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