Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bbf1d40749bd54a…

MALICIOUS

PDF

69.9 KB Created: 2020-11-13 15:20:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 08937ae0ced9c470cbc889dc283b4251 SHA-1: be616a149ffb3f3ca45d9f358a32a17340c93bc8 SHA-256: 1bbf1d40749bd54aa34b1f30541eff7b00f1c3750d2091fedab271ab2a8c106e
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of external links, with one prominent URL pointing to 'trafffi.ru', suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, contains text related to a '90 day bible reading plan printable', which appears to be a lure.

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://trafffi.ru/123?utm_term=90+day+bible+reading+plan+printable PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378846/normal_5fa61d6c29b76.pdfIn PDF document text
    • https://kekulewu.weebly.com/uploads/1/3/4/3/134398637/rosegepojilivoxazuj.pdfIn PDF document text
    • https://finivoxub.weebly.com/uploads/1/3/4/3/134387593/4006852.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376866/normal_5f8b216c45e60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421781/normal_5fa77bdfc18c7.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/35ada9a3-8690-450a-a0a4-5073a2c878c7/56796991618.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4a12e97-ccae-48c3-9428-5946c9659b86/wivuvetodon.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/miwufe.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/horror_games_free_online_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3fb00c4-5ded-496b-a332-17649e81216e/34011741878.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2a05d8d-6ebc-446c-9a86-439bbb03ff27/baylor_school_of_music_scholarships.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49e258d0-fbc0-4418-a9d9-612f7c52a539/77382604113.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbc26aa0-26bf-4c3b-8d8c-49f856c04f20/dudonawepiruvu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ecbfaf9-b917-4754-828e-2293e26ce476/xuxenarezuvot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f1f83bb-ee29-4a25-91aa-88124112539c/55c3_bmw_e90.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_off0000d5e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E0 5392 bytes
SHA-256: 86d15a3d98e73771ad539bd8c0565330ec9f877064a94406194d9f0bb30a133d
font_01_sfnt_off0000e846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE846 10088 bytes
SHA-256: c62f999175043f0c77a9a1a58a4f19460852fe9f13aaf5ee2294008c57d5657a

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