Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eb930ced2d94d80…

MALICIOUS

PDF

77.1 KB Created: 2021-05-17 00:51:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 55b7b0cc13ad7cd5b10d8108a7d6ea93 SHA-1: 276be0e432f4164b8c80fc94d73820e8bf2173eb SHA-256: 2eb930ced2d94d8029cf1d955fec22185a8ae76bf8308db664eb6ddc24a2bfa2
156 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting it's part of a link farm or SEO manipulation scheme. The primary URL, https://vilenefex.ru/strik, is likely a malicious or phishing destination. ClamAV detection and ML classification further support its malicious nature, indicating it's a phishing trojan.

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://vilenefex.ru/strik?utm_term=genesis+v2100+bike+price PDF link annotation
    • https://cdn.sqhk.co/duditizonut/LNicbhj/subudogesuluboxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387061/normal_604a1bb6b9d04.pdfIn PDF document text
    • https://vakilelem.weebly.com/uploads/1/3/1/3/131379598/pozebe-kojozejera.pdfIn PDF document text
    • https://boxizegovabore.weebly.com/uploads/1/3/1/3/131379280/896901.pdfIn PDF document text
    • http://gagimubu.mywebcommunity.org/acidic_and_alkaline_foods.pdfIn PDF document text
    • https://babewepuk.weebly.com/uploads/1/3/4/3/134311046/julad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476783/normal_6068801b1bf8b.pdfIn PDF document text
    • https://cdn.sqhk.co/nazamesuwute/jbjaG7K/singing_in_the_rain_streaming_canada.pdfIn PDF document text
    • https://surugodinatuv.weebly.com/uploads/1/3/4/8/134861851/9224439.pdfIn PDF document text
    • http://wefilevazobakeb.mypressonline.com/cfl_bulb_circuit_diagram.pdfIn PDF document text
    • https://cdn.sqhk.co/bokirebi/ign7jar/javep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415544/normal_604cd70501b35.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/dopugaxelelema/heart_drawing_ideas.pdfIn PDF document text
    • https://30cc9e9c-6145-4029-bfdc-d0561bdb3a10.filesusr.com/ugd/0dcf4b_7c8c34d75b9247eba8be373e95421641.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/zenazukutiful.pdfIn PDF document text
    • https://s3.amazonaws.com/vinejivunitego/86065712385.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/xokajura.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/uppababy_bassinet_sheets.pdfIn PDF document text
    • https://72cee60b-533f-4fda-9f40-87b1bb6f0553.filesusr.com/ugd/590778_7b060386edc74624b5cb65702eedfd5a.pdf?index=trueIn PDF document text
    • https://e97408dc-4b05-4e3b-9f19-f4127feb49ef.filesusr.com/ugd/a42eed_0867cf4bc5a14a4eb87e17eb83fa515b.pdf?index=trueIn PDF document text
    • https://43fe4710-460a-4ad3-90dc-2dd795c51528.filesusr.com/ugd/a32c20_f4e0f75757e342eba6c4f7cc3de9b3f0.pdf?index=trueIn 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_off0000ecbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBD 5308 bytes
SHA-256: c182c2d4709ad3f608e238caeb06e112a41baaa2c6ba9d4da7fa4d15b513b0c7
font_01_sfnt_off0000fef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF1 11828 bytes
SHA-256: d15fbd85e450c3bbb26d2bf22bfae39ba7cd03b5cf0bce45b4a7192074920980

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