Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dbf6721b1af83d1…

MALICIOUS

PDF

81.6 KB Created: 2020-11-18 02:47:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 15588a9e25a5252f5229529e5450156e SHA-1: c37d919598443d693163274729b13984e02f6fd7 SHA-256: 8dbf6721b1af83d127d489a7a974e5fa1527144b5148f6760134db9d9802fafe
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm. One of the primary URLs, 'https://traffnew.ru/strik?utm_term=hum+aapke+dil+mein+rehte+hain+mp3+do', suggests a phishing or malicious redirection attempt. The ClamAV detection and ML classifier further support its malicious nature, indicating it's likely a phishing or trojan delivery mechanism.

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://traffnew.ru/strik?utm_term=hum+aapke+dil+mein+rehte+hain+mp3+do PDF link annotation
    • https://seranogi.weebly.com/uploads/1/3/4/2/134265977/tazomokimimo_rajimodefeki_fawaz.pdfIn PDF document text
    • https://bekarofadu.weebly.com/uploads/1/3/4/3/134346179/fuvaxizapolivi-pakumesajalodo-pisejegi-tiludulanugexar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421208/normal_5fa16ba85f8d8.pdfIn PDF document text
    • https://pezolorizogor.weebly.com/uploads/1/3/4/6/134692003/1520080.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401692/normal_5fad588857dd0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415974/normal_5f98aaa22f62d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415055/normal_5fa5369234940.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404123/normal_5fab2b5da983c.pdfIn PDF document text
    • http://://c/s/he/he/he/he/he/he/he/he/he/he/he/he/he/he/he/he/he/he/he/he/he/he/he/he/he/he/he/he/he/he/he/he/he/he/he/he/he/he/he/he/he/he/he/he/he/he/he/he/he/he/he/he/he/he/he/he/he/he/he/he/s://a10.gaanacdn.com/gn_img/Album/ZaP37OR3Dy/ZaP37OR3Dy/ZaP37OR3DyIn PDF document text
    • https:///a10.gaanancdn.comIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa6e5d91-a8fb-4211-afc5-6100a9b33a52/lugivoroluw.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/adobe_xd_carousel_template.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/1_bbl_full_form.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_off0000e382.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE382 9644 bytes
SHA-256: 8a9b8870d5758084fe8643f1e2191b56fbac832d8832532cb7e69a19d6a06f5b
font_01_sfnt_off00010289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10289 5208 bytes
SHA-256: e9a669c38ef821b23768e056815142e6eb808b8ce3d509eb51b938d077d98912
font_02_sfnt_off00011413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11413 10964 bytes
SHA-256: 0996601a4cc04730dfe91750992dd6f3379a963e368750b277ef92653b68ccee