Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad4ef49386f1c39c…

MALICIOUS

PDF

79.1 KB Created: 2021-03-29 02:06:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: c894248ebe47a50f4749a6ab8870e5dc SHA-1: d8e36f8e9ec646ac75cb9c27dbbc72b00231d5b9 SHA-256: ad4ef49386f1c39c2d3391f6c2b9b5aa2c3e712fe416ad4058ea8557f0f26991
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting and are associated with link farming heuristics, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://jumiwimov.ru/wix?keyword=panasonic+sd-yd250+service+manual PDF link annotation
    • http://spindlndou.space/masha_e_urso_portugues_portugalkl4ys.pdfIn PDF document text
    • http://changepass.online/12215492835ben8s.pdfIn PDF document text
    • https://cdn.sqhk.co/bunigenozav/ifhjjbO/50_in_1_arcade_game.pdfIn PDF document text
    • https://cdn.sqhk.co/rumoligodo/ihhiejc/octonauts_and_the_whale_shark_book.pdfIn PDF document text
    • https://diziwupufetut.weebly.com/uploads/1/3/4/4/134477772/zapuk.pdfIn PDF document text
    • https://cdn.sqhk.co/fonizijodi/hblRjh0/miranda_lambert_husband_hay.pdfIn PDF document text
    • https://nivosuvadifo.weebly.com/uploads/1/3/5/3/135384950/wonawixufup-tulobexanumovop-julukujomigin.pdfIn PDF document text
    • https://kuburabet.weebly.com/uploads/1/3/4/3/134362545/pexobobovurur.pdfIn PDF document text
    • https://cdn.sqhk.co/jawefujivi/ghamCMq/cisco_asa_security_plus_licence.pdfIn PDF document text
    • http://paypallsecurity.com/65160086207usz9n.pdfIn PDF document text
    • http://pinixubezanamot.iblogger.org/petigosogakeku.pdfIn PDF document text
    • http://hightrade.club/famupunojovizq7q5i.pdfIn PDF document text
    • https://simujuzejopu.weebly.com/uploads/1/3/5/3/135305424/178921.pdfIn PDF document text
    • https://judadumoxa.weebly.com/uploads/1/3/4/7/134718892/xajibanimet.pdfIn PDF document text
    • https://cdn.sqhk.co/rawejefipemi/jjvheji/govamojon.pdfIn PDF document text
    • http://gouliwer.online/marantz_sr5009_review_whathifim54mc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wotalagaxidi.rf.gd/oxford_business_dictionary_free_download.pdfIn PDF document text
    • https://e31b828f-dd5d-4b35-abba-5777d5fc2ed6.filesusr.com/ugd/56a8cc_bb0071df8954408e92bdb3f1917f3a8c.pdf?index=trueIn PDF document text
    • http://fovuwikotunepam.rf.gd/jamununiter.pdfIn PDF document text
    • http://pofotelomog.rf.gd/73602721358.pdfIn PDF document text
    • http://vaduxovogemuke.epizy.com/zebagesi.pdfIn PDF document text
    • https://1c54689f-8f60-44d8-8d81-b144d6ea8ada.filesusr.com/ugd/787b0a_e04fc591417e4f5f87d299823bc288c8.pdf?index=trueIn PDF document text
    • http://tananij.rf.gd/24790224603.pdfIn PDF document text
    • http://retelikejajego.rf.gd/soviropilenurot.pdfIn PDF document text
    • https://de315c38-daa2-4293-b666-e554ba9b7d65.filesusr.com/ugd/564d2e_f6271b2fb25b4761964ab2ffe17fcd46.pdf?index=trueIn PDF document text
    • http://vorivur.epizy.com/tepajosomimidabipoduw.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_off0000f3d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D0 5676 bytes
SHA-256: aef58314b1690d65831c80f9af6ccc581860ef8595a7a3d9f896b8644e1fc5d8
font_01_sfnt_off00010728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10728 11716 bytes
SHA-256: ab6024f7f4f88df76cfd9255891a48448a8ada38fffaac65f7969e7f71d5536f

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