Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0199ba9dd468137…

MALICIOUS

PDF

72.8 KB Created: 2020-11-22 09:42:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: ee030a9d4700fbf200c716a2fccc5070 SHA-1: d2c147d74c7bf0bdb40e0e4697aac9797826ee61 SHA-256: f0199ba9dd4681373963e386f4444dccb28827dabb4b979db0f50d5b7870dd20
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://traffking.ru/123?utm_term=camp+manual+washing+machine PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446649/normal_5fa5a68f904b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366014/normal_5faa1ba862f91.pdfIn PDF document text
    • https://pirovosarelivo.weebly.com/uploads/1/3/1/4/131406751/lopigorazemiririsix.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://uploads.strikinglycdn.com/files/6e9a5cf9-63eb-4eca-b6d0-6e86a5fc907f/cool_math_games_bad_ice_cream_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3b41147-cdc9-4352-a850-f29d8fba8b06/pudevusadeguke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fc982ef-e511-4616-aef7-d2b567328da5/52_95_8_tabela_periodica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10c1a184-4261-44f8-9b65-47f539011f57/mepibi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/389a9f64-4ab2-46a1-917f-dc1a8b60cc1a/75722637261.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/1594136093.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/general_ebook_reader_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dd0b1d7-2f4b-46df-a6f3-041680f07a48/20288131967.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd747de5-cd66-4810-8581-73061a1fd0a5/26293319620.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d0d3736-a02e-4f12-871b-3783d0029eff/lamenorowovepapizaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4721778e-41a5-4021-aa14-b6d37f7ea987/ravexolufeve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45898fcb-0248-46bf-94ab-7fe7c6b6de2d/1981_omc_sterndrive_manual.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_off0000d1a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1A2 5060 bytes
SHA-256: ff8dfde9d4c56f223ebf957c4eb04c05f30c0bb2c9aa2a916c5960447f1b3d96
font_01_sfnt_off0000e2b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B9 10636 bytes
SHA-256: 711d37facc13b7ad180ae586dd97e37db9806e3450bcdcb6435faef9a0f8fda5
font_02_sfnt_off000106e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E0 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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