Malicious PDF — malware analysis report

Static analysis result for SHA-256 06293a2720dfd009…

MALICIOUS

PDF

62.8 KB Created: 2020-12-19 00:35:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ef1ac0c447e9de42e516afa15dbd9888 SHA-1: 9db2826891fda2cdb460fdcbade38b05d2914b9f SHA-256: 06293a2720dfd009380780abfaad4001b1b2f8f24b798a86d53d9908e0c07f1c
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 0.9998

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/strik?utm_term=main+street+st+charles+ice+cream PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453334/normal_5fb98e05631d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424985/normal_5f9cfa654daf0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381085/normal_5faa332e1d2be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487618/normal_5fdba493df62a.pdfIn PDF document text
    • https://moleresudiba.weebly.com/uploads/1/3/4/4/134447347/345a8026a23051.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/c55ab913-775f-466f-9dde-2502fd35d502/smart_alec_candy_barr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0535ff4-c250-40eb-800f-97f57f74ab28/nojopoliwekisegixosapu.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/83014250183.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/scion_tc_automatic_transmission.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7060a8e5-4810-4c89-a4d7-62615846abe5/jacksmith_unblocked_76.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2e3e598-0f92-482a-9da2-c36d7c5df6c8/menemixekejigajazuz.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_off0000bb87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB87 5044 bytes
SHA-256: b41b6cbda3d59a951317cedc62998eac5275b6865db4cf486222ea7aeaa44b1d
font_01_sfnt_off0000cc8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC8A 10116 bytes
SHA-256: 9ad27a8c4bdd34e78fde9f2a7d4a70d6d1ae7cd366e1cdb825ee6b9a955d58bc