Malicious PDF — malware analysis report

Static analysis result for SHA-256 01f313b0c742d6c4…

MALICIOUS

PDF

70.8 KB Created: 2020-12-19 15:17:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 93f3035aaa51c1f6dfbdbc2f7962eb01 SHA-1: 594e963efb7cd908467303c7f9640e0ec822ffee SHA-256: 01f313b0c742d6c40d802d92f0ee30a17a4cc9052acce9275f865d437096f04a
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with many pointing to disposable hosting and redirector infrastructure, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier also strongly suggest malicious intent. While no scripts were extracted, the embedded URLs are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gettraff.ru/aws?utm_term=converse+platform+sneakers+philippines In PDF document text
    • https://wivezinafixozut.weebly.com/uploads/1/3/0/9/130969190/piximuwekefakomot.pdfIn PDF document text
    • https://mubojage.weebly.com/uploads/1/3/4/3/134377346/loziwojivobuvadijoz.pdfIn PDF document text
    • https://guvepilafofifiv.weebly.com/uploads/1/3/4/6/134682232/vajirupatovop.pdfIn PDF document text
    • https://gijogolip.weebly.com/uploads/1/3/4/7/134755622/nijaxujabirazafako.pdfIn PDF document text
    • https://dubutabinagi.weebly.com/uploads/1/3/4/4/134441981/9f5d2.pdfIn PDF document text
    • https://noxitituruvid.weebly.com/uploads/1/3/4/9/134904787/nupovoviwaxorogo.pdfIn PDF document text
    • https://fotejisatowonu.weebly.com/uploads/1/3/2/3/132302873/8675286.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481058/normal_5fc9f4ccb9aa5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366402/normal_5f88d2e46297c.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/zuses/98885896835.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/kingdom_two_crowns_hermits_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18c0736e-75e1-415f-93b4-f0d0b69f3609/harry_potter_emojis_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7ddf026-1a1c-4c59-be58-181b76211323/59016848936.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/17674981034.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_off0000cb3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB3F 2952 bytes
SHA-256: cb9072f881c1fe0ad8900bbcc5a20a23fabb306412f64e001cac76c2a9509f2c
font_01_sfnt_off0000d5ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5CE 5168 bytes
SHA-256: ce93b138450799d3596e2e46e157e57d3ebfcec828d69f9cf5ffd42d970e0df0
font_02_sfnt_off0000e73d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE73D 11204 bytes
SHA-256: e294867c6cdabbdaad36e14aae8eb6d1f99007909ce1f8d0406fe655e9149360

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