Malicious PDF — malware analysis report

Static analysis result for SHA-256 370c805510182ebc…

MALICIOUS

PDF

67.4 KB Created: 2020-12-20 10:01:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 90b290252fac6d236ac78e872ff48981 SHA-1: 87d6f77861f5265cbcad6879a7306f722ec4f525 SHA-256: 370c805510182ebce0f3bfb01267dacebc9970a74f63043dcaa54e299bf8cf8f
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or scam attempt. The embedded URL `https://ggtraff.ru/strik?utm_term=is+6.5+inches+big+or+small` is flagged as malicious. The document body, though heavily obfuscated, contains text that appears to be a lure. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

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://ggtraff.ru/strik?utm_term=is+6.5+inches+big+or+small In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/report_power_outage_columbus_ga.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc514356b97992eb576a7c1/t/5fced9901b45e152edb73f9e/1607391635308/1916_world_war_1_naval_battle_crossword.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/fipekuxeminojiraliliwufa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f44da6e-6958-4c1a-9da3-3bc9b8579e1e/professional_society_in_texas.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/20105364334.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/17_queen_st_worcester_ma.pdfIn PDF document text
    • https://s3.amazonaws.com/zatazewoz/catia_v6_2009_crack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b26a8da-9b66-4dad-8ccc-1d9bbc5f7727/sobre_verdade_e_mentira_no_sentido_e.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fc9b559-cf4c-44ab-9601-d32e4cde2668/dapijiwatatibekikirov.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c273a13a450babf34cb7/t/5fc14524145a8629dcdf88e8/1606501669434/astronomy_study_guide_quizlet.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/dojifotit.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc79b24f2297e36a9ff7b03/t/5fcffbf33679834d723caf14/1607465973011/noah_bottle_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81456736-1bdd-455b-9113-63e6786fae4f/pojadoruduv.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_off0000cb46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB46 5600 bytes
SHA-256: af15248849c056c15b12de259e1fc82c26580367ed242be55c8627a3bad214cb
font_01_sfnt_off0000de34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE34 10080 bytes
SHA-256: 7ab558927742354c2382a6e9ccb3dd94ba12ed00aa72da941041d96eb3d7605f

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