Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf26841974895755…

MALICIOUS

PDF

73.7 KB Created: 2020-12-15 16:33:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 000414bcf763d63285a3d9d027f73121 SHA-1: 5bfcc04aabe70fa742380deaa8ba4eb094375c46 SHA-256: cf26841974895755c632232c4f209cc7fb3baf0a6fddd1515c1816855a73260d
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to direct users to potentially harmful websites. The presence of an external URI pointing to 'trafficel.ru' further supports this, as it is labeled as unknown and could be a phishing or malware distribution site. ClamAV also detected this file as 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=non+parametric+measures PDF link annotation
    • https://japosazononugad.weebly.com/uploads/1/3/4/5/134583509/pobarevebotuji.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/3483500.pdfIn PDF document text
    • https://xobijetulotifo.weebly.com/uploads/1/3/4/2/134234675/jesegubavitixaxar.pdfIn PDF document text
    • https://pesadoxemanuz.weebly.com/uploads/1/3/4/8/134852899/pokedinotibakoxu.pdfIn PDF document text
    • https://bativizamazon.weebly.com/uploads/1/3/4/7/134770744/gawizivegod.pdfIn PDF document text
    • https://wajovojov.weebly.com/uploads/1/3/4/6/134652085/82973daaf1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fc13b47c14dfd36fef3b64a/t/5fc5604af81c9a2a0c57400f/1606770762665/toy_soldiers_song_in_movie.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd14b912cb2817442fde26/1606227129928/zanti_pro_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/10083569003.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/zonajujipetid.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc54eb7085bf90c0e1a52d3/t/5fcfcbddd40958657afb5d43/1607453664101/dabalibem.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf645e18c5c478ec12aa4/1606284869888/gazubejukos.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc68b805687f52b6ba81b4e/t/5fcad0eebce7087d1acfe155/1607127278851/zinejodedigitijomu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc00570a3bf4b14aba44e61/t/5fc0e8ab08845d0924ab71c6/1606477995374/58098594187.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B2 4896 bytes
SHA-256: 940d7ae0eda2dc4f8edb2a6bccb20fadd999581e0745998e49f774b30c1794d6
font_01_sfnt_off0000e53a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE53A 11292 bytes
SHA-256: e1e11e9b49cbf7fd322bad7cca0177e2723025110ca131a5af25c5708139899a
font_02_sfnt_off00010b95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B95 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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