Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f3f151b20d4e94b…

MALICIOUS

PDF

84.4 KB Created: 2021-05-02 21:42:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5bd900ad3ec510e86c54c26de515e795 SHA-1: 72d875f6da66b7fa72b41d784b88e30b918849cb SHA-256: 6f3f151b20d4e94b48f34cbe93540d2f207923bea103e3201723c6ea5159c91a
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gimoguvi.ru/strik?utm_term=lenovo+t420+upgrades PDF link annotation
    • https://tafugamukizigip.weebly.com/uploads/1/3/0/7/130775106/85461.pdfIn PDF document text
    • https://kisewosa.weebly.com/uploads/1/3/1/0/131070890/6f4e8802.pdfIn PDF document text
    • https://lugijuvumefabi.weebly.com/uploads/1/3/4/7/134761930/talolilage-jepolizokul-mivodekogorinov-xebovol.pdfIn PDF document text
    • https://talebizipuvi.weebly.com/uploads/1/3/1/4/131483067/2493425.pdfIn PDF document text
    • https://wixuzezokanozav.weebly.com/uploads/1/3/4/6/134663812/591601.pdfIn PDF document text
    • https://fuxaxogajumuw.weebly.com/uploads/1/3/1/4/131406658/8730693.pdfIn PDF document text
    • https://ruvatekokero.weebly.com/uploads/1/3/1/4/131437102/d1131d7c35b11.pdfIn PDF document text
    • https://vipomumukewa.weebly.com/uploads/1/3/0/8/130813786/c03dad2a490c139.pdfIn PDF document text
    • https://newewakezodem.weebly.com/uploads/1/3/4/6/134680802/josoxotoxekipubafiw.pdfIn PDF document text
    • https://betozuwozoz.weebly.com/uploads/1/3/4/1/134108580/bazumifosafibil-losokife-nizakudubiw.pdfIn PDF document text
    • https://buwolipirawelas.weebly.com/uploads/1/3/0/8/130874522/1367829.pdfIn PDF document text
    • https://falopizesolirod.weebly.com/uploads/1/3/1/3/131379111/730be.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/jovekus/where_to_donate_used_furniture_in_durham_region.pdfIn PDF document text
    • https://8ca15cf9-c5bf-4329-906a-32df3c7b5ab7.filesusr.com/ugd/4ca7f5_a3a80190b6a54ce8be812673a23573a5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/16572234935.pdfIn PDF document text
    • http://daxupote.epizy.com/taxonuvezivikigixowor.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/dewumas.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/jeux_de_cartes_a_deux_bataille_corse.pdfIn PDF document text
    • http://xiluwudikipo.epizy.com/treatment_of_portal_hypertension.pdfIn PDF document text
    • http://lamisegowa.epizy.com/xavizumadijevawu.pdfIn PDF document text
    • https://c245485c-e1a4-4c5a-9a2a-c465a95e53c8.filesusr.com/ugd/25f824_637b228c2f194adda1e95e858a074ec7.pdf?index=trueIn PDF document text
    • https://044ec7df-721b-4788-b209-87474a3fcb06.filesusr.com/ugd/60ffa2_7ba1096a90b04db5be3463a118d9b690.pdf?index=trueIn 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_off00010a71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A71 5460 bytes
SHA-256: 9513f15d2e9821055d6d09f6727a36157a22615e4cd63415b103b0ece1a80390
font_01_sfnt_off00011d25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D25 11732 bytes
SHA-256: 4a3c10e32ba842decde53731f4683523106519b352aca311dae8d775c930edf1

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