Malicious PDF — malware analysis report

Static analysis result for SHA-256 009dc9d6a5d845d4…

MALICIOUS

PDF

79.6 KB Created: 2021-03-18 00:20:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: baf91ebf417f4f8310066bd567651c22 SHA-1: 20a3672b3e600fbc86e826c74d3ef0efbb04d467 SHA-256: 009dc9d6a5d845d489d3eedfc7535b91663619bb01722cac71e49835ba637480
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 0.9992

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://dugedepap.ru/award?keyword=congestive+heart+failure+articles+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4478415/normal_60269b999272c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370056/normal_60345b34bd7de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402478/normal_600fe0c08d20b.pdfIn PDF document text
    • https://cdn.sqhk.co/dufimogemeka/ibhaMib/2020_super_snake_truck_price.pdfIn PDF document text
    • https://cdn.sqhk.co/nudogada/FhhjetA/rolling_2_ball_bowling_bag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403263/normal_5fdbd37cd3012.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416128/normal_600b2571b6628.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/c7e4678a-b020-4b77-904f-e05359ee44aa/vavefojile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3384a96e-16f7-4d0f-9bdf-a56646ec190c/komet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fac54d2-b973-45dc-9e8d-669711ebecfe/best_business_development_job_titles.pdfIn PDF document text
    • https://4ac36a2f-1533-488b-b282-cf34cdace458.filesusr.com/ugd/bcfc12_25017fc514ec47c4865621824df7f6e2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fajujiju/mini_dv_tape_player.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d0bbbe1-0c9c-47bb-a46b-6dd389d2bebb/58974620217.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/how_to_reset_a_water_heater_tankless.pdfIn PDF document text
    • https://c07b3cb0-7d4a-4e65-9c62-eb3bd0ce3b6b.filesusr.com/ugd/7560d5_0322cb3ecc9a46ba850c3cb3c5c106e1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/59e13403-6413-40ce-805e-20e27cd299c8/what_is_the_meaning_of_time_management.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94882c81-9db0-424f-8f16-03249377533e/97892883028.pdfIn PDF document text
    • https://aa4c2489-c93b-4667-afab-104bf5323bad.filesusr.com/ugd/8b49c6_f9b52122420149f29f9082db6c181e70.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cb0ebd4-b8c6-44ec-91b4-a49f3fd94fc4/wemekixozodupederasan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e90ffba0-0c3b-42cf-8e6c-bd20dcdb6915/pajipibewanet.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/sorghum_beer_brewing_process.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d4d0836-38a1-4c44-b664-3b30544e4670/79331627309.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/what_is_the_latin_word_for_law.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_off0000fa39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA39 5384 bytes
SHA-256: 8bd6baf6243b7763225913c0e87eb863136b6df124808aad5826575afede0230
font_01_sfnt_off00010c8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C8F 10584 bytes
SHA-256: c6606ec95df8ecea8befc9e123bc9ac598a5394a8d7f2172cd29455d535fe5b5

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