Malicious PDF — malware analysis report

Static analysis result for SHA-256 450c2eab1c6e21cb…

MALICIOUS

PDF

102.7 KB Created: 2021-06-11 02:13:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bf6aa17abd78488de6ad6361c2956092 SHA-1: 98997ac09547a8d1d64d9b7a2c39873d2cb1e105 SHA-256: 450c2eab1c6e21cb5c076c81db367580872d95091bf63fd702edbcda227fc637
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://pixomot.ru/pbw?utm_term=project+operator+in+dbms PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4423750/normal_60186dd5a6473.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369493/normal_5fe5c16481c5f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444100/normal_5fed09fce35d3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410441/normal_5fee8514aa19a.pdfIn PDF document text
    • https://jilowenuvugema.weebly.com/uploads/1/3/4/8/134897306/nifagopigoralu_magiwawo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401518/normal_5fdbff78e3be6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458635/normal_605c5b375ec51.pdfIn PDF document text
    • https://zivixitusinuz.weebly.com/uploads/1/3/1/3/131380786/danakiguf-petagusosaku-xikakesuvag-zelewam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469850/normal_604cd756984ed.pdfIn PDF document text
    • https://tabodixab.weebly.com/uploads/1/3/4/5/134585887/8519469.pdfIn PDF document text
    • https://kuvitarige.weebly.com/uploads/1/3/4/0/134095916/3078048.pdfIn PDF document text
    • https://magavesitike.weebly.com/uploads/1/3/4/5/134581553/eb979.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://natofuke.pbworks.com/w/file/fetch/144835875/bixotabitinifi.pdfIn PDF document text
    • http://rajejor.pbworks.com/w/file/fetch/145070070/6107090065.pdfIn PDF document text
    • http://murenet.pbworks.com/f/31625949690.pdfIn PDF document text
    • http://sakulibur.pbworks.com/w/file/fetch/144627522/16716136721.pdfIn PDF document text
    • http://liwuvedesisu.pbworks.com/w/file/fetch/145085703/xetepasof.pdfIn PDF document text
    • http://noxiwako.pbworks.com/w/file/fetch/144891096/wifafu.pdfIn PDF document text
    • http://jesababa.pbworks.com/f/buy_instagram_followers_for_iphone.pdfIn PDF document text
    • http://tejudafo.pbworks.com/w/file/fetch/144476655/presser_foot_guide.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_off00015478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15478 5404 bytes
SHA-256: e647d415d8e308523fb490e3087512f9018a31342c56ba2d077d87ded927cc5a
font_01_sfnt_off000166bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166BB 11164 bytes
SHA-256: c5442635d908b0ae6a95fe93c5fb7b1f37f2a2eb872b5f763ed1a44c4242772b

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