Malicious PDF — malware analysis report

Static analysis result for SHA-256 753204116c2911ae…

MALICIOUS

PDF

88.1 KB Created: 2020-11-24 23:46:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e6a88eaf9e40b5fefd63f79d21ee32f3 SHA-1: 029f00cf090334c2be791c0a0df3f44c28aa5e5e SHA-256: 753204116c2911ae9ae08751ad4751dbb830bbdd36264a8383a81cdaf5d8a149
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. One prominent URL, 'https://traffset.ru/strik?utm_term=industrial+revolution+impact+on+graphic+design', suggests a phishing or SEO manipulation tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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://traffset.ru/strik?utm_term=industrial+revolution+impact+on+graphic+design PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366011/normal_5f87085758022.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407062/normal_5fa0579daffd0.pdfIn PDF document text
    • https://vabekozel.weebly.com/uploads/1/3/4/4/134487462/1829072.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448536/normal_5fa57c6d34410.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/b3d5d504-4929-4847-80e9-bd3d456e2dc3/vegaminalojata.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/407b4b49-a6da-4aaf-9567-b6a1f5a36595/87700489817.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af3d18f9-1fb5-4990-9e64-cca9b8c1fcc3/en_50126.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b67975d-92f1-4a1d-9cea-af09297033e3/gedoxapolorobudugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16890b7f-b366-4e15-83fa-1da9b6cfbca3/25122336925.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/980fb1ef-a87e-4d6f-b774-1b483de5514a/74911970994.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/turtle_shell_backpack.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/fidelity_brokeragelink.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9bb2c3f-9b7f-40d4-a832-221a45c083e3/sebazosibulawesud.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_off00011bb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB0 5484 bytes
SHA-256: 336d926699ea3fe9de789c4112cae2dab48e8b12161deaff347d30cac3aa81c2
font_01_sfnt_off00012e32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E32 10784 bytes
SHA-256: be3c846ae9fd941e912bc12a8fad3c6ad8d591b9e19b6b1e67bbe9857ca441c3

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