Malicious PDF — malware analysis report

Static analysis result for SHA-256 c654cb142d8c3c5b…

MALICIOUS

PDF

85.3 KB Created: 2021-02-02 04:18:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9bbe5da54edc11af6a26f6fcbb018166 SHA-1: e5b9b645f206af3275187d2c5299f17861bf9e8e SHA-256: c654cb142d8c3c5b66ec5581447731ed4c395d44aa565d54c1f77dc428b2d022
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting an attempt to manipulate search engine results or redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://crophysi.ru/123?utm_term=el+pollito+pio+roblox+id PDF link annotation
    • http://saratov.ooo/54242673525wxwgl.pdfIn PDF document text
    • https://zunejafeg.weebly.com/uploads/1/3/4/3/134382709/lesajinefiwazefide.pdfIn PDF document text
    • https://cdn.sqhk.co/vuritukupus/bihx8TR/vifune.pdfIn PDF document text
    • https://dokegofixak.weebly.com/uploads/1/3/0/8/130873830/kipesiroreparuraro.pdfIn PDF document text
    • http://albl.ru/business_law_class_notesmyeb6.pdfIn PDF document text
    • https://xonatusapu.weebly.com/uploads/1/3/5/3/135391421/f98f1f3946b2c4.pdfIn PDF document text
    • https://cdn.sqhk.co/tunuzasana/SlhZV4S/50341895537.pdfIn PDF document text
    • https://cdn.sqhk.co/tezabulaw/rLjdhdS/arcade_games_list_by_year.pdfIn PDF document text
    • https://pabitunevogozut.weebly.com/uploads/1/3/0/7/130776295/daxofufaxuvomelujeb.pdfIn PDF document text
    • https://melekutiruj.weebly.com/uploads/1/3/2/7/132740408/texolil.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/wekibik/sisikimig.pdfIn PDF document text
    • http://rajamuviw.epizy.com/diabolik_lovers_more_blood_psp_game.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/kojirotelimokuzerejege.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/gafizamewufesukugorifaxi.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/79558669958.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/quarterly_business_review_template_word.pdfIn PDF document text
    • http://dadewom.epizy.com/air_force_reserve_orders_request_form.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/deool_band_marathi_movie_ringtones.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/sodikasif.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_off0000f683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF683 3664 bytes
SHA-256: c173ad97cce45689f14c0132097fed49ac2323a5f9c6b3ebbb7d79a293006568
font_01_sfnt_off00010386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10386 4732 bytes
SHA-256: 0d1ad0c7ad89858cf587eb31e001e365fcc3fa65c421f276787edc138528c78e
font_02_sfnt_off000113a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113A8 17076 bytes
SHA-256: 2a0ca9c7f7b1ec6323f04fb3c775ac0b23cc006ec303c41a845ba429b7603e8d

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