Malicious PDF — malware analysis report

Static analysis result for SHA-256 49c32aab49ff088c…

MALICIOUS

PDF

72.7 KB Created: 2021-01-16 12:18:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: c37b84514b9f8670e73ca875d1661dad SHA-1: e05036d64935ed75c51c92a2d10f2cadf193d921 SHA-256: 49c32aab49ff088cf6f46d703b0e20a8fc613e19a6a6976e1ff7052982bc23af
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which are linked to known malicious redirector infrastructure and disposable hosting services. This indicates a likely phishing or scam attempt designed to lead users to malicious content. No scripts were extracted, but the heuristic firings strongly suggest a malicious intent focused on URL redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/aws?utm_term=charpy+impact+test+lab+report+discussion In PDF document text
    • https://guxiwejibu.weebly.com/uploads/1/3/4/9/134902351/riziludor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366014/normal_5fc871037a94d.pdfIn PDF document text
    • https://cdn.sqhk.co/sebutarukaw/ahdmyhi/war_of_spells_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/tosijoxopum/hbihiaF/words_in_a_pic_2_dansk_svar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409395/normal_5fad7522b52a3.pdfIn PDF document text
    • https://mepafuxutare.weebly.com/uploads/1/3/4/6/134660934/sakitivezilike.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369645/normal_5fa8347baddc8.pdfIn PDF document text
    • https://jagunafine.weebly.com/uploads/1/3/4/3/134363358/nomotivusos_gedukew.pdfIn PDF document text
    • https://lujoduxatodovaw.weebly.com/uploads/1/3/2/3/132302833/8914304.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389387/normal_5fcef72f23bb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481676/normal_5fba15a362a90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f878e53e4ae9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365635/normal_5fc19e074cfb3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417813/normal_5fc915122e36d.pdfIn PDF document text
    • https://mewuvirinikupu.weebly.com/uploads/1/3/4/5/134505229/jelaburogurazu_venibipajefejap_legolikatofaw_xerub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378383/normal_5f8b41dd27480.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000def5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF5 5460 bytes
SHA-256: d62e644c124791ba7e5b034f7921e4fdb0cb75f7d4005d2e8f8a937a3205e400
font_01_sfnt_off0000f153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF153 10508 bytes
SHA-256: e67b88ce0b7aba4c3793f6eb8ca5d51f232b0320afcb4996a1f47223ed6d43f6

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