Malicious PDF — malware analysis report

Static analysis result for SHA-256 80fed20eba54e226…

MALICIOUS

PDF

70.8 KB Created: 2020-11-20 17:46:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: fbdcf6ea8feb3c81691c1e8ac3288cfa SHA-1: 2dcf3483b03333151106503d817ee7c147a80861 SHA-256: 80fed20eba54e2262daa4da1f80b14a0f65bcf9a784d11d882de452259a25c49
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://trafficel.ru/123?utm_term=uke+chord+chart+basic PDF link annotation
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/zipudusedoxugo_fatad_wubolokesimafi_timamo.pdfIn PDF document text
    • https://melokiziw.weebly.com/uploads/1/3/4/6/134669089/karomiv.pdfIn PDF document text
    • https://wakukowasipala.weebly.com/uploads/1/3/4/6/134649118/mowaviwuduxofivob.pdfIn PDF document text
    • https://xutewosabog.weebly.com/uploads/1/3/2/3/132303209/zikakalopifa.pdfIn PDF document text
    • https://lixojubenolida.weebly.com/uploads/1/3/4/3/134375882/novujikoxojo.pdfIn 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/2866d635-eca0-46f5-abde-4f7ccafda48c/54530570392.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21eb6e78-d460-4877-811c-62a42f656d95/31407437176.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/90636085943.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d527c37-380b-4286-9918-a8658fc18f78/libro_quiubole_descargar_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1379bd67-f4fd-4332-a880-6de94f28a44c/games_strategies_and_decision_making_2nd_edition_solutions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fa076ce-1501-416c-bdc9-8ecea04af5fc/89042831434.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_off0000dab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB3 5192 bytes
SHA-256: f23ef6f50040bff9cae343a3523041544656e0f1348d11b820be331413ecfb1e
font_01_sfnt_off0000ec50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC50 9976 bytes
SHA-256: 7478d31a3320aec45254662015a932f6aaafb09e5290a4a75b483415952db2dd