Malicious PDF — malware analysis report

Static analysis result for SHA-256 49baf2a24e5a5a66…

MALICIOUS

PDF

67.3 KB Created: 2020-12-23 14:40:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 5d1506f88e982bf2f0dd4d7cc42b272e SHA-1: c0581174bd3cf9d1424e72c815c52e1c91f00ba9 SHA-256: 49baf2a24e5a5a668e6cc3e69f6a8dfb657979f15740da67279380a6eedbe11e
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains a large number of external links, many pointing to PDF files hosted on various platforms, suggesting a link farm or redirection scheme. The primary URL, https://trafffi.ru/aws, appears to be a malicious domain used for distributing further payloads or conducting phishing campaigns. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://trafffi.ru/aws?utm_term=little+stars+nursery+coleford+ofsted+report PDF link annotation
    • https://xagatozemeladab.weebly.com/uploads/1/3/1/4/131406701/fasoropatelefo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467593/normal_5fcaf96cb1d8c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375209/normal_5fdd351383078.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446026/normal_5fa8d247c3346.pdfIn PDF document text
    • https://binufigelivu.weebly.com/uploads/1/3/4/7/134775083/potesidukobonol-kaditajewazezap-zemugokaje.pdfIn PDF document text
    • https://xepajozojiv.weebly.com/uploads/1/3/4/4/134476610/23c34b84cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448750/normal_5fad3d8f98296.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379626/normal_5f9bf09ba928a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417321/normal_5f9db6a9b6ea4.pdfIn PDF document text
    • https://sorilegumuda.weebly.com/uploads/1/3/4/8/134886674/duwajulifowog-dajebolulu-fobiloton-berikupisag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505159/normal_5fb7ab1f48790.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368977/normal_5f8b1ce6e3199.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366623/normal_5fd153e6c8135.pdfIn PDF document text
    • http://www.lsnursery.co.uk/Shopping��07:30In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/nozepatagudevikuwuvo.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/dewurepiwuseromowuru.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b1e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1E0 5192 bytes
SHA-256: c72dcbb54e7d8688646a4d57ab55a6f084133894fccffb95b9961ca3252769c0
font_01_sfnt_off0000c3a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3A5 11424 bytes
SHA-256: c40823b31c7769719d1051d4fd30afba42aa839d2aa7173e60d13029cee91f00
font_02_sfnt_off0000e8fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FD 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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