Malicious PDF — malware analysis report

Static analysis result for SHA-256 b669b7ca0a9da902…

MALICIOUS

PDF

67.2 KB Created: 2021-03-19 16:45:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 1152086dd7963bb0e2c9a65e9e33d655 SHA-1: d0609c05081924af6e51323b69017cdc84275cfd SHA-256: b669b7ca0a9da90222a55fd1b96ec039d8525ca00b5d7e67d7c9aa2143d614b1
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous embedded URLs, with a primary one pointing to 'jumiwimov.ru', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be a lure related to a Dyson vacuum cleaner manual.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jumiwimov.ru/aws?utm_term=dyson+v6+animal+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4454184/normal_600607619f1a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382771/normal_5fe6b9ee7d100.pdfIn PDF document text
    • http://logmeinnow.xyz/43700615211dh15k.pdfIn PDF document text
    • http://uscreditreport2021.info/87487133736jr58u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475562/normal_602983aec5608.pdfIn PDF document text
    • http://baffer-shop.space/39557622822iko7z.pdfIn PDF document text
    • http://vatidenow.medianewsonline.com/99112672740.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460678/normal_6030f61fe1a42.pdfIn PDF document text
    • http://videohost.space/zividozojazigult2qg.pdfIn PDF document text
    • http://55571.ru/godipuwipj922.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470835/normal_601dd1667858a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460477/normal_5fdbe267295f4.pdfIn PDF document text
    • http://kikababono.mywebcommunity.org/94400030587.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://94db4134-5784-44c5-a63d-963e509970fa.filesusr.com/ugd/9c58c5_a20e6db852df47e2b728f727e6177932.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c10104e-07e1-4116-9f20-f2d85a46eb75/how_to_change_time_on_sam4s_sps-520_cash_register.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4867414-d343-4b17-aa09-e536b2fd145d/how_to_calculate_the_rating_of_a_transformer.pdfIn PDF document text
    • https://60ceb029-6f78-4d42-8ea4-15ca08d8077a.filesusr.com/ugd/857e61_b9eb4515c0944b8182610de8bf08986e.pdf?index=trueIn PDF document text
    • https://9170d309-caca-4186-8987-bf6b40ce219c.filesusr.com/ugd/baef12_8869a44908df46fca6d5aa25ee817bd2.pdf?index=trueIn PDF document text
    • https://f0f855fd-29d2-4bf6-9fdd-af1de8d1f91d.filesusr.com/ugd/184831_fc4e889749bb4243ad0b90e0ed2aaf30.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/33f93302-55e8-4691-87db-21f99404b346/91084985101.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef404e2b-fcf0-46a9-bfb7-bfe8e16e9bef/certified_mail_return_receipt_requested_no.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7756aaf-a09f-4812-814e-7060c5a93a99/68724926687.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_off0000cb57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB57 5048 bytes
SHA-256: 2a4e2080cae478d7cbc2f781194c226748b1d1329ece46c91a23a7cc98fa7071
font_01_sfnt_off0000dc86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC86 10360 bytes
SHA-256: 21649657c9557c1bd860e83de7577027ad45e59d1ebd6d6ff9d33f7288bb9fee

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