Malicious PDF — malware analysis report

Static analysis result for SHA-256 556836188df55fb7…

MALICIOUS

PDF

59.3 KB Created: 2020-11-18 03:19:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: eb01486c079d28b9f89b5b8ec505c2c9 SHA-1: 2292ebed3616b0b87edb0c777c1b1f203c5d9b6a SHA-256: 556836188df55fb78315056a16125b027c9bd4c52767ebb46284349556e0b890
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 0.7756

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/strik?utm_term=edelweiss+eiden+fantasia+walkthrough PDF link annotation
    • https://vubisurajoguv.weebly.com/uploads/1/3/4/2/134265568/toburazip.pdfIn PDF document text
    • https://kojelokawuzu.weebly.com/uploads/1/3/4/3/134341929/5673163.pdfIn PDF document text
    • https://wesujugureju.weebly.com/uploads/1/3/0/8/130874517/finagakasokaruxug.pdfIn PDF document text
    • https://mekuxiwefajup.weebly.com/uploads/1/3/0/7/130739023/rigodapotor_dudopoxa_sotalikepe_zibogora.pdfIn PDF document text
    • https://fulipevaxavu.weebly.com/uploads/1/3/2/6/132695351/e4e04ccb83ff3.pdfIn PDF document text
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/4707947.pdfIn PDF document text
    • https://moleresudiba.weebly.com/uploads/1/3/4/4/134447347/2002682.pdfIn PDF document text
    • https://lixezakokigek.weebly.com/uploads/1/3/4/5/134596317/zibizitimisibog-xipapebot.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/juvuraguvutoxif/descubre_2_workbook_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/49737531789.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/893067ce-fd87-4076-9343-8f59ec86503b/ridgefield_tax_collector.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8756a5b-e2b3-4746-a49d-5d11ad54a380/9472829948.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54e0a441-45e6-4989-bcb4-958af5aeb5ed/pimunikibaboko.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF65 5164 bytes
SHA-256: 2dd38790f714be5400147b92428e3fac5b151aa33316543a6263ab9a9a7bd043