Malicious PDF — malware analysis report

Static analysis result for SHA-256 13babff6979b9854…

MALICIOUS

PDF

70.9 KB Created: 2021-02-23 20:23:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: dd193974b93d760ce5b07349b66d357a SHA-1: f7595b4cb7f1717a8e0301070a1b4e015128bb01 SHA-256: 13babff6979b9854ce13eedba39f69f307ac0fe375387841befdb583ada3a657
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external links, with 'https://maypoin.ru/wix?keyword=weapon+of+awe+nethys' being a prominent example. The PDF also contains embedded URLs, suggesting an attempt to redirect users to potentially harmful sites. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/wix?keyword=weapon+of+awe+nethys PDF link annotation
    • https://nezokamovijemi.weebly.com/uploads/1/3/1/8/131856769/dubedadumu_lifoninatanane.pdfIn PDF document text
    • https://jovigazever.weebly.com/uploads/1/3/1/6/131637362/9603625.pdfIn PDF document text
    • https://kikokemez.weebly.com/uploads/1/3/5/3/135331375/miwuniv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471109/normal_600b13185d805.pdfIn PDF document text
    • https://nedetuvozuwe.weebly.com/uploads/1/3/4/6/134699612/kodewisujeri.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486033/normal_5ffa77e94d845.pdfIn PDF document text
    • http://apparently-home.com/kasuvixosalajogovivesatij02hs.pdfIn PDF document text
    • http://kungfumalibu.com/kinajivamatenoduro9m1gq.pdfIn PDF document text
    • http://successinyourlif.website/counter_terrorism_intelligence_analystno6fr.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/povelenavuviw/the_love_shack_chester_menu.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/dubiva.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/sepowu.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/acp_guidelines_diabetes_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/1663857748.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_off0000d9f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F0 5068 bytes
SHA-256: 4e9dd65e80b8389bcc208155ece1b6e72c9119cd30dc51b3ef3f24fd4d91a6b2
font_01_sfnt_off0000eb56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB56 10496 bytes
SHA-256: 6b4b65ec7e59b0396ce8b0bccf827578c3b93c9c99328a8a54acb50161a3914d

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