Malicious PDF — malware analysis report

Static analysis result for SHA-256 afc82bbeed2de82e…

MALICIOUS

PDF

75.6 KB Created: 2021-06-03 08:28:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a16839b8f56b5c6258dfc7bbfbc5d238 SHA-1: 4b40b3f97fa59a247580c1922606f7ad259b9780 SHA-256: afc82bbeed2de82e328283a245260b78f52a687290aa3666a4265b146fa0f127
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, with a primary suspicious URL pointing to 'golowaki.ru'. The document's structure suggests it's designed to act as a link farm, likely to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://golowaki.ru/123?utm_term=baseline+schedule+narrative+report
    • https://cdn-cms.f-static.net/uploads/4414161/normal_5fd88d29d6b71.pdf
    • https://jixatazibasuv.weebly.com/uploads/1/3/4/4/134402985/9bbe69092d3dbb.pdf
    • https://static.s123-cdn-static.com/uploads/4446045/normal_5fdee4ae92f66.pdf
    • https://cdn-cms.f-static.net/uploads/4382621/normal_6044f7a5f041f.pdf
    • https://cdn-cms.f-static.net/uploads/4414847/normal_606e2914ccf3e.pdf
    • https://cdn-cms.f-static.net/uploads/4465537/normal_6066de046d6c6.pdf
    • https://nawuwisenaz.weebly.com/uploads/1/3/5/3/135318134/0d1422c16a.pdf
    • https://cdn-cms.f-static.net/uploads/4389365/normal_604de40aaddd9.pdf
    • https://cdn-cms.f-static.net/uploads/4380405/normal_604da2d88949f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b95df6e0-da07-4fb2-ac1d-fff7160f5eea/979063485.pdf
    • http://wiwedano.pbworks.com/w/file/fetch/144428595/how_to_reset_relion_premier_compact.pdf
    • http://lugozamuxika.pbworks.com/w/file/fetch/144421494/descargar_cantos_del_camino_neocatecumenal_mp3.pdf
    • https://uploads.strikinglycdn.com/files/f09bd222-4e96-4bf6-8bee-f6906426e679/best_guitar_riffs_for_beginners.pdf
    • https://uploads.strikinglycdn.com/files/e30f09af-16f2-4df0-a223-b9cba13b9582/mercruiser_4.3_idle_adjustment.pdf
    • https://uploads.strikinglycdn.com/files/2b10da4d-62c6-44b2-81ee-ed67a23f9075/flying_fairy_toy_charging_instructions.pdf
    • http://savavaze.pbworks.com/w/file/fetch/144476034/titulizapi.pdf
    • https://uploads.strikinglycdn.com/files/4650b1b7-4fdf-44fd-b1d2-d3c53c83bfe4/sony_bdv_e2100_price_in_philippines.pdf
    • https://uploads.strikinglycdn.com/files/d36d01b2-4e64-4b0b-a0bf-848c4a49191e/a_letter_to_my_nephew_quotes.pdf
    • http://wimarolos.pbworks.com/f/21187289327.pdf
    • https://uploads.strikinglycdn.com/files/6e95e708-0b61-431a-987f-838e0ffa36b2/calories_in_taco_bell_food_items.pdf
    • https://uploads.strikinglycdn.com/files/67e21e5f-e0be-4080-90fc-4f99ac10210f/dunogusatenokonor.pdf
    • https://uploads.strikinglycdn.com/files/8997d94d-1931-4400-b5eb-3c5db7d30101/fopezoso.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea99.bin
cf3023ab92b3f868862057683cce8fdc85acd58d599f2ef2132c887ecf404d15		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA99 5268 bytes
font_01_sfnt_off0000fc85.bin
3ffc83b3586f0a023696e1fb7b983274135bcf7dcd67bd9a5c5db938cf525e08		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC85 10636 bytes

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