Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e0f92d94f9c88f9…

MALICIOUS

PDF

73.0 KB Created: 2020-12-19 06:24:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 78688e343b18411900a34fcf5f9e282f SHA-1: 7872f2bd476ec078d850466cd7fb8c683ebf83c5 SHA-256: 0e0f92d94f9c88f9d5316cdf2b0f50d5ba093dcd31d61ea73fac5ed24422232d
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains numerous links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting an attempt to distribute malware or phish users. ClamAV detection and ML classification further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gettraff.ru/strik?utm_term=dilution+chemistry+worksheet+15-5 In PDF document text
    • https://waboralitenir.weebly.com/uploads/1/3/4/5/134504299/pudera_gubavomukufano_rijunolopixew.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/lazolu/last_chaos_affinity_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/bluestacks_free_for_windows_8._1_pro.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/captain_america_movie_tamil_dubbed.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/asme_y14._5m_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/408-586-8481__-8659.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fed2824a-2fca-437e-bc1e-1083aa452e64/45056320064.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/minecraft_map_adventure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70da612a-d6ea-4761-a969-2270b37412d4/can_you_get_dragon_priest_robes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b30ea053-5894-49c3-9c0c-690600c44a1b/58045184094.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/demivan.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/bts_fake_love_piano_sheet_music_easy.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_off0000de45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE45 5296 bytes
SHA-256: 2b8aaa52e3d7bab0c66fa2c7b4dee689e349173130eada4a21e147a37ca79183
font_01_sfnt_off0000f04b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04B 11492 bytes
SHA-256: edafbd72d6fd023bba2486321e1c40b1047310dd5aef5b3d9fd060275732a982

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