Malicious PDF — malware analysis report

Static analysis result for SHA-256 746d67a6bba97064…

MALICIOUS

PDF

80.9 KB Created: 2021-05-19 16:03:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 289b0b8e60acc61c2afb564fdfc1ac7c SHA-1: 7e656458e8d6be1c0de1656353dca8e8f4441f5e SHA-256: 746d67a6bba970647ab3594e259964646d864e19d8f65827596165e8448960ae
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized and point to seemingly unrelated documents, indicating a link farm or spamming operation. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of numerous external URLs suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/strik?utm_term=taco+5000+mixing+valve+rebuild+kit PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4444630/normal_600533b090211.pdfIn PDF document text
    • https://nusomosuguxapo.weebly.com/uploads/1/3/4/6/134693055/miniwubipozuju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451210/normal_6055b704eaa4c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482882/normal_5ffa4eac7744c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372980/normal_6024af410195e.pdfIn PDF document text
    • https://nomibazet.weebly.com/uploads/1/3/1/4/131437462/wulawaki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465908/normal_6056f12e20e57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375093/normal_60301d0fb8da4.pdfIn PDF document text
    • https://tigelulipuneve.weebly.com/uploads/1/3/4/7/134746657/153891.pdfIn PDF document text
    • https://datokusowijodo.weebly.com/uploads/1/3/0/7/130776434/faxete.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386830/normal_606ba17ccc7c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367680/normal_600c0035cd96c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409092/normal_60516a02c69ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370092/normal_601b7620a00bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426421/normal_6014809d55b7c.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/f101bde3-6c6e-4012-8af6-c5e77aca5d22/2007_polaris_sportsman_500_efi_wiring_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c94efb6d-362f-4e38-9bcd-332b351ed7ae/nabafezekisukexexafi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c69c5d1-e680-417a-9d15-7a6edbb36166/angela_carter_bloody_chamber_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8959793e-fe8e-4399-bbe9-2ba2a88bc33f/oster_steamer_5711_rice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4424c475-6c46-489c-849e-7a1a373fa898/circle_diagram_of_induction_motor_mcq.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c462f61c-f80c-4a30-b4e3-c91e74e59490/63108827044.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_off0000fdac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAC 5628 bytes
SHA-256: 0dc3afdce37e7efa79ae288b4dd24697b990778e549417b74296ad1aee569382
font_01_sfnt_off000110c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C7 11012 bytes
SHA-256: ef9662132e594d91a5062921c2b4a25c7f496ba63a272b0bd46d5541ace41bc6

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