Malicious PDF — malware analysis report

Static analysis result for SHA-256 e077b13f407ca78f…

MALICIOUS

PDF

80.6 KB Created: 2021-02-18 06:39:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d51e8edd96fde361b26865eb3ced1e84 SHA-1: 8c6eccb366a3aaee262bf089328db42be238c258 SHA-256: e077b13f407ca78f03f7b03c7c6bd1b442342644936d593906aca416827b2c2a
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to disposable domains or known redirectors, suggesting a link farm or phishing campaign. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious redirection, likely to a phishing or malware distribution site.

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://yafferge.ru/wix?keyword=skyrim+thieves+guild+quests+raven+rock In PDF document text
    • https://cdn.sqhk.co/sezunofubuzi/ghj8LNv/car-_categories_road_trip_category_game.pdfIn PDF document text
    • https://vumukawa.weebly.com/uploads/1/3/4/6/134662430/kabuxazanu-tejevatabu.pdfIn PDF document text
    • https://lipemegovaw.weebly.com/uploads/1/3/4/7/134766771/e77406e78bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459478/normal_602d9b8110bd9.pdfIn PDF document text
    • https://tatogupuragafa.weebly.com/uploads/1/3/4/0/134096405/toxoze.pdfIn PDF document text
    • https://cdn.sqhk.co/jadepibake/gigVihU/23208852442.pdfIn PDF document text
    • https://gixovazaviv.weebly.com/uploads/1/3/5/9/135982549/falilowes.pdfIn PDF document text
    • https://vopukuno.weebly.com/uploads/1/3/1/3/131383764/vasijuzeda-womizuw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481985/normal_60071ecf188c7.pdfIn PDF document text
    • https://cdn.sqhk.co/tamurikubol/c0ii0iL/35046632698.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367644/normal_6008cc3597d11.pdfIn PDF document text
    • https://matexofetuboso.weebly.com/uploads/1/3/1/4/131453592/8a6b17f22014.pdfIn PDF document text
    • https://cdn.sqhk.co/devepogisog/rBjjij7/28017007165.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485822/normal_5feed6e172e87.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477167/normal_5ffe74cfaa9bd.pdfIn PDF document text
    • https://cdn.sqhk.co/tumosirewuw/LiihgfM/wofebunevifepukof.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/divelatoxa/the_manual_of_biocontrol_agents.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/blue_header_design_free.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/kesem.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_off0000fa50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA50 5808 bytes
SHA-256: 4c6f3146cb8915a254e97ab26ff87d18bebada4686e450e0531a5f60c5dbd015
font_01_sfnt_off00010df0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF0 11816 bytes
SHA-256: 59cce0a0c36c303b26bf98754772a20a9495616b183138d179812e1d9efa46db

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