Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec97fce72931dc13…

MALICIOUS

PDF

73.4 KB Created: 2020-12-26 01:54:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a893ac8c853bce5751bfba8a7c0f2aac SHA-1: 7e2e9b1529304732d2fdf46f03fbc7976bba5e5e SHA-256: ec97fce72931dc13bc78f44c5cba47660121e06b9b2ded660f42157997ff75d3
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to movie songs and application metadata, likely serving as a lure to direct users to malicious URLs such as 'https://traffset.ru/aws?utm_term=chintakayala+ravi+movie+songs+free'.

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/aws?utm_term=chintakayala+ravi+movie+songs+free PDF link annotation
    • https://fusonunobowur.weebly.com/uploads/1/3/0/8/130813531/kenox-gewakewunixa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413469/normal_5fae5253d8e24.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473616/normal_5fd0484f6e870.pdfIn PDF document text
    • https://gadiziwit.weebly.com/uploads/1/3/1/4/131406086/4590197.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386822/normal_5fe66db14ad18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476010/normal_5fd91b1835b14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459324/normal_5fb80933d04a2.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/efa6e703-c95e-462d-971f-91407a8b1c85/gugupirifawiku.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/pomajavufujanodejiximul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c96a15c-ff81-4c19-af2f-4392dcc3d764/west_side_story_america_score.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a91f183-d145-4332-a09c-da76e7e9b8dd/xatezig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9240bee-3bea-416a-a2fd-00cacd4fbc9a/3687086262.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/nra_pistol_instructor_course_test_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a38deb48-bd1a-4f29-9b0c-61593d2f66f6/80872794368.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_off0000e0d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D4 5312 bytes
SHA-256: afc6c797722cdf498f64c2ea5fda6e8872a42551adc5d4a9edd58b9ce6dcf650
font_01_sfnt_off0000f2c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C3 11036 bytes
SHA-256: 4153f03563733250d8fe7bfa2808ebeae920aa3377f731b13a9455a86f1e08e6

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