Malicious PDF — malware analysis report

Static analysis result for SHA-256 485b9bbecde11144…

MALICIOUS

PDF

79.6 KB Created: 2021-03-25 16:14:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 352f6dec13294cd74dd1afcbc779ed05 SHA-1: f0637355a16d1cb66619fc82add530a83f922eb9 SHA-256: 485b9bbecde111441c0b1eadc7d1d7ab0191d018b5fece84188e1813e023e23e
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, with the primary suspicious URL being https://midufefew.ru/strik. The heuristic PDF_SEO_LINK_FARM suggests the document is designed to host numerous links, likely to distribute further malicious content or engage in phishing. No scripts were extracted, but the presence of numerous external links points towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://midufefew.ru/strik?utm_term=5th+edition+paladin+spell+list PDF link annotation
    • http://likefetevu.getenjoyment.net/bob_family_tree_worksheet_printable.pdfIn PDF document text
    • http://kind-insta.site/99199249854e0od.pdfIn PDF document text
    • http://olymp-trade.top/91846462080ewjdu.pdfIn PDF document text
    • http://jabewes.medianewsonline.com/gikifaxutoruwukeb.pdfIn PDF document text
    • http://mantenancie.com/delupegerovelajusazbu5gb.pdfIn PDF document text
    • http://zakewabo.scienceontheweb.net/lesajozefuzezonurowu.pdfIn PDF document text
    • http://nat-fru.space/pinball_felt_leg_protectorsacamb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lutepotazor.onlinewebshop.net/lisaduzojosupesuzemobos.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/tomb_of_annihilation_backgrounds.pdfIn PDF document text
    • http://viromumixemet.rf.gd/samsung_refrigerator_model_rf263beaesr_aa_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/30814699848.pdfIn PDF document text
    • https://80c93ba6-74df-4afb-9852-3a83eaba20e3.filesusr.com/ugd/4cf28d_eeaad468b1474cdf98a0036cbe6a2b41.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/36055390572.pdfIn PDF document text
    • http://pitigapevede.onlinewebshop.net/algebraic_expression_worksheet_grade_6.pdfIn PDF document text
    • https://a0bbd489-bf03-48a0-8e93-88abd0751e5b.filesusr.com/ugd/370ea2_a6b167ff34444f1cafdfd77998c6cd15.pdf?index=trueIn PDF document text
    • https://d74058ad-8c31-4576-aeb4-582a73b10e1e.filesusr.com/ugd/666c83_35c55efe7d634249b9ad5fc6874074d2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/podumarufosok.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/32619097769.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/9547880010.pdfIn PDF document text
    • https://178c1879-e916-404b-9861-a2431bd0f83a.filesusr.com/ugd/1aace6_ea9b2ccbb3be4d619be4f39b8ae39526.pdf?index=trueIn PDF document text
    • http://tulutubuvidimo.epizy.com/carestream_vita_cr_system_software.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/66355854762.pdfIn PDF document text
    • https://s3.amazonaws.com/gogoxowiniza/25114039083.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/kafovamifi.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_off0000fc1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC1E 4980 bytes
SHA-256: f42ad6ffe7a7657c9f64001b012a2cc4d44cd564320d57788154cb12f9d2a19f
font_01_sfnt_off00010d0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D0A 10436 bytes
SHA-256: e9954a7fcd3d7f78c776d017a0ddcba7ff431af346a00ec86024d439f2badf17

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