Malicious PDF — malware analysis report

Static analysis result for SHA-256 a44412733f1c75e2…

MALICIOUS

PDF

89.2 KB Created: 2021-03-21 00:25:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: df4f7f28ab047f7617c9fc59953c0d9c SHA-1: f8e2ebf4b1f4cf9fd732c59f8a103cc4777fc768 SHA-256: a44412733f1c75e22fbae2b1b71813a2d8b6afa6f67147f67f45c2c4977133ac
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm and a potential phishing or malware distribution vehicle. The ML classifier and ClamAV detection strongly indicate malicious intent. The document contains numerous external links, including one to 'seumenha.ru', suggesting it is designed to redirect users to potentially harmful sites. No scripts were extracted, but the PDF structure and link farm behavior are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • 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.
  • 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://seumenha.ru/award?keyword=oxidation+of+primary+alcohols+to+carboxylic+acids+pdf PDF link annotation
    • https://kizerovum.weebly.com/uploads/1/3/4/7/134747257/gudotutevu.pdfIn PDF document text
    • https://foxuginatumusex.weebly.com/uploads/1/3/0/7/130775376/wotowekaxin-sikuvulezepiv.pdfIn PDF document text
    • https://jajipovel.weebly.com/uploads/1/3/4/5/134527293/01afa04493cc21.pdfIn PDF document text
    • http://beweroxaku.66ghz.com/vekevu.pdfIn PDF document text
    • https://darimigavibibej.weebly.com/uploads/1/3/3/9/133997658/pokezirukajebag_zenusupejopo_rusigawa.pdfIn PDF document text
    • https://tajizaruf.weebly.com/uploads/1/3/0/8/130813694/lojumupaxoval.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ef3f611-c3fc-4a6c-a33e-e59b788089ab/10348494980.pdfIn PDF document text
    • http://ferobinosu.epizy.com/graco_click_connect_35_expiration_date_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75216b16-70ce-4e26-8110-2b2851b08990/2007_ford_f250_diesel_maintenance_schedule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43b22b84-8931-42bd-a664-9428b4a07385/jazazuwamexepitipamutopew.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/bittorrent_windows_8.pdfIn PDF document text
    • http://tejojode.rf.gd/sobedogiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/014dcd39-09b1-4cdf-b716-f2f254a1ee90/60370998797.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/wexazufexupobip.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/intelligent_business_advanced_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3354eaaf-59e5-4c7a-9002-c817967f60a9/70808462622.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1a12241-b64a-4162-86ef-eb4bc7edc03a/91350782553.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd69e662-e3d3-4ce6-968e-16a9cf86562d/principles_of_biochemistry_moran_5th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/43480530070.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7d2da60-0e1c-4ebb-b627-232812976ee5/what_is_a_broad_statement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ff385ea-d2f5-46fd-b80e-9f8c74d45ad5/i_too_sing_america_poem_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b49e5f2-0551-4ae4-b58d-a29780bd4444/palibumoduvitetakemof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bff1c69-e2e0-4ce8-b001-13d430d8781a/persepolis_comic_read_online.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A3 3904 bytes
SHA-256: 792f869492d0e192327e118d64b0ab95494e0a035f77542549086f1f32ac66d7
font_01_sfnt_off00010572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10572 5732 bytes
SHA-256: 80ba9fb30cfafe64dd33b3785dd6c3ddafcec15bbd4557ac0a43bc889c65dcd2
font_02_sfnt_off000118cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118CD 11712 bytes
SHA-256: 19bbebd4c13be6ba5234505933f10310f0241834ad1be77c062ef5adf73116d3
font_03_sfnt_off0001410d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1410D 16108 bytes
SHA-256: d52bf788b175fab42d1fa151756e9428e13ab31a1d8f5c4bc803c38aa9d9b65d

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