Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bc95fd8fe72ce2e…

MALICIOUS

PDF

92.0 KB Created: 2020-12-25 04:43:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 5e6a0ef5e4227679750b053c63bd1eee SHA-1: 79a5cf77372980d46b035ddf6beafaa7ce5a261d SHA-256: 0bc95fd8fe72ce2e903fec5b88f9352da24ebb5e8711a275518e94abba7283d1
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by multiple heuristics, including ML and ClamAV, as malicious and phishing-related. It contains an embedded URL pointing to 'traffnew.ru', which is likely used to redirect users to a malicious site. The PDF's structure and embedded content suggest it's designed to exploit user trust, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffnew.ru/123?utm_term=transformers+shattered+glass PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367950/normal_5f88c5a47a8b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450048/normal_5fbe2f1a0797a.pdfIn PDF document text
    • https://vumifedesonuzik.weebly.com/uploads/1/3/4/8/134849268/9d60237ae2a5e.pdfIn PDF document text
    • https://buporinedo.weebly.com/uploads/1/3/4/0/134041533/236862.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448720/normal_5fa0d40d8f4ac.pdfIn PDF document text
    • https://wovuposekase.weebly.com/uploads/1/3/4/6/134613379/nejazujeniselim.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382629/normal_5fe3457c78dc7.pdfIn PDF document text
    • https://judezirebesos.weebly.com/uploads/1/3/4/6/134669344/siritexawelu_wisipifus_wuzogexoputepu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/cc1398d5-0781-408a-b15a-0df84f7faddf/29908914347.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6917809-71d2-4bf4-9e73-428883d21e8d/visible_light_uses.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/lemiwokibag.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/maguvevo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49d7fb73-2c2b-455e-be2b-0dc3c239f7c0/pozedenabogujewate.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011eb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB5 5012 bytes
SHA-256: 921ba7d3badeb79bd99b0f8f99d5722e82058c2509ae6444ac22caab62d4abcc
font_01_sfnt_off00012f86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F86 10932 bytes
SHA-256: 9c38e3a01d16250b94f4a0a37d5df1ace7e53bbd961d3dde1d0702ed71aa2d24
font_02_sfnt_off0001550f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1550F 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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