Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd318452298f0b00…

MALICIOUS

PDF

73.1 KB Created: 2021-03-08 22:04:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4e9756bd7915911b4d57f399f8f2845e SHA-1: b80ecd41b317f51d8f3245e757670d312245b649 SHA-256: dd318452298f0b00f53d228f20611ddd37393e036b258f61aa7b7e4f62e7c8a0
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing lure, specifically using an educational topic to entice downloads. The embedded URL points to a redirector, likely leading to a malicious payload. ClamAV detection confirms the malicious nature of the file, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://seumenha.ru/123?utm_term=pearson+elementary+statistics+6th+edition+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4471948/normal_604589596355f.pdfIn PDF document text
    • https://cdn.sqhk.co/xovepejegosi/cKBgZUF/bright_dots_in_peripheral_vision.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376379/normal_5fca9155bedc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489598/normal_5fd62cee4fc49.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372076/normal_5fcdbe9ad39d9.pdfIn PDF document text
    • http://koponegigat.medianewsonline.com/how_to_program_a_dish_remote_to_an_emerson_tv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444356/normal_601d694e6735c.pdfIn PDF document text
    • https://cdn.sqhk.co/raguwubives/4mghBib/lituridimiwoxal.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367961/normal_5fde640016503.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387566/normal_5fce43f41578a.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/jaaghiK/autotrader_florida_cars_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/gabixeme/n3pIWid/rock_and_gravel_tucson_az.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374953/normal_602af30536d2a.pdfIn PDF document text
    • http://sirunome.mypressonline.com/kokilod.pdfIn PDF document text
    • http://lemakomude.sportsontheweb.net/2655519119.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383917/normal_603ad17a573f6.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/bbd48116-63f6-41d3-831d-45c400653b5f/11650403400.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/496217d5-5835-475b-bc47-3064a8f4a555/41143763823.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59d502ec-a530-46d6-8012-e90828e2c625/why_iceland_is_called_land_of_fire_and_ice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73b8ab0a-1e6c-4ccf-8040-bd619f1fcb9d/gibukabobafurelakiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b86f0fe1-de5d-4db2-a01f-3e5e56dc705b/96924761418.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97c5b385-a596-44ae-b78d-06a8157edc87/whirlpool_cabrio_dryer_parts.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_off0000e08b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE08B 5528 bytes
SHA-256: 21177fb29eebeed1715f2567c38855950de0d1df752ea0264136815929478a12
font_01_sfnt_off0000f339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF339 10348 bytes
SHA-256: bbcfcd3b27ca805924b92d8973814a9a7bee9f44ed973ada1d1e644eafe2d68d

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