Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2b58d6dd143e806…

MALICIOUS

PDF

63.4 KB Created: 2020-12-17 18:06:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: fa01b11bfe7c62a04b79a0195667ae99 SHA-1: 16419bbe8b68aa0525814b782ca1c9ec97aa94bc SHA-256: a2b58d6dd143e8063a11fe04af744c7b15ab03d169c94c33922ff769c7d85a76
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically 'https://traffking.ru/strik?utm_term=36+inch+over+the+range+microwave+amazon'. The ML classifier and ClamAV detection strongly support its malicious nature. The document body, though heavily obfuscated, appears to contain keywords related to the URL, suggesting a lure to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://traffking.ru/strik?utm_term=36+inch+over+the+range+microwave+amazon In PDF document text
    • https://cdn-cms.f-static.net/uploads/4486374/normal_5fb305c1851fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368503/normal_5f87afce4fc40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447460/normal_5f9e1f37a4c5b.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/060be850-116c-497f-8ba7-f4ca2776c776/ddo_best_monk_build.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d443ffd-40c8-4580-b0da-608e3686a573/dudogivalusefatafo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6e79c87-1546-4a17-aa3b-da81ee64c7cb/56169688843.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/fikejogokilobuledilipu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4fc978ef7301f8b2b2885/t/5fd10120715f2c671488d786/1607532832433/battleship_mod_apk_revdl.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6efe7c2869f0c81c03194/t/5fd21c40b1f69267715ea86d/1607605312934/pure_sweat_basketball_workouts.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc14b808139af037647f366/t/5fc78f6f09f4d56e8f8909c4/1606913903584/hitting_wine_glass_sound_effect.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc29bc888c99b6d37b22e2f/t/5fcfaa9668c18617d41c1b71/1607445142997/66660071492.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc568c38139af037663541a/t/5fc7b35c788a962b7c38a18e/1606923103628/army_parts_of_speech.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_off0000b799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB799 5428 bytes
SHA-256: 39ea87e86035af30cae8ca40c4ee7d8d40ca55aa4a433deb9fc90942c9b623e7
font_01_sfnt_off0000ca06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA06 11600 bytes
SHA-256: dc9b6a57d5552bba9dc50f870e625d993f3203a28c3892fc1fb164630d90a7a7

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