Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dbdf49c330276cc…

MALICIOUS

PDF

70.5 KB Created: 2020-12-26 21:45:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 08dc782d36d96b2a23a73468a00994b9 SHA-1: b0188ccd5a9c317d4a7e8811ab32bfa9db87e1f3 SHA-256: 9dbdf49c330276ccda2dbcd9ba431000d1f0bb1a50612388d6692cf312840ab2
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, indicating a link farm or phishing attempt. The embedded URLs suggest an attempt to redirect users to potentially malicious content, possibly for SEO manipulation or to deliver further payloads.

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://trafffi.ru/strik?utm_term=marketplace+mall+champaign+covid-+19 PDF link annotation
    • https://vuzirokisex.weebly.com/uploads/1/3/4/5/134576988/xigobigumavuditi.pdfIn PDF document text
    • https://pegiromilu.weebly.com/uploads/1/3/4/6/134683304/3283547.pdfIn PDF document text
    • https://cdn.sqhk.co/vemonososepa/R1vWbNx/tovinibavutuvotinakanil.pdfIn PDF document text
    • https://cdn.sqhk.co/sejujona/gfwkpgd/28375665182.pdfIn PDF document text
    • https://woruranevulabiw.weebly.com/uploads/1/3/4/0/134096732/4474198.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/2da1af33-f39a-412e-9441-1860f574d637/rigaboxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5277a07e-295b-45ef-8fb1-af665bd8dede/42252015778.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c5846c0-5571-4dda-bafb-3213355d981b/88077935578.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7fc6aa3-9fd1-4ed0-a0e7-c933a179558d/teddy_bear_cartoon_characters.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/84509595479.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcc11f04-f6fb-4182-8134-a62fc44e5af3/lifetime_movies_2016_based_on_true_stories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0955007-078d-42ea-bff6-f3134f87f1be/funny_dog_gifs_animated.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_off0000d593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD593 5680 bytes
SHA-256: 812ecba6c88f51ad3328208d4c5b62bf51b5e08273e3079ea3f8111a7bb1947a
font_01_sfnt_off0000e8e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E6 10656 bytes
SHA-256: 18cef6861eacc51427a8c1746e76b7a2f0a099ba741403184702b62e4f6cf3d6

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