Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aca1546acb3e4a5…

MALICIOUS

PDF

68.7 KB Created: 2020-12-24 02:43:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: da70974884d55c6638f4610b59381585 SHA-1: e216238d21898a5e09bc7800ee45f39f39ea0c75 SHA-256: 0aca1546acb3e4a50124fece8b624381060a1131256415c5de4ef1b59156afbc
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 a high-confidence heuristic firing for a malicious ML classifier and is detected by ClamAV as a phishing trojan. It utilizes an SEO redirector with the URL https://traffset.ru/strik?utm_term=power+rangers+legacy+wars+descargar+para+pc, which is presented as a lure for downloading a game. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it was generated programmatically to facilitate this phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://traffset.ru/strik?utm_term=power+rangers+legacy+wars+descargar+para+pc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365608/normal_5f87469a298b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367674/normal_5f9acf512e215.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450889/normal_5fbef9279da02.pdfIn PDF document text
    • https://cdn.sqhk.co/vopufepivipe/jcgdie5/sleep_sounds_free_relax_music_white_noise_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375541/normal_5fa12313cb03d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414358/normal_5f9b67f10e03d.pdfIn PDF document text
    • https://cdn.sqhk.co/bakavaxa/ljihjt2/hicare_sanitizer_price.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/1eb73c43-530d-417f-901b-b17c4415f3ea/vanilla_pudding_cake_recipe_from_scratch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d012ac1-7123-4e54-8a5b-9649f33169a2/dofis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80a72913-b471-4766-b050-051ee624fcd0/a_mente_esquerdista_baixar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12ef3c55-af79-4b7c-ba93-0bfed98e8077/dasex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae1fec85-eed6-481a-94ca-a7da121beda7/webitogaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2de2f93d-8112-4e7a-b391-5207711a3a3f/woo_a_woman_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29f880f9-fcef-4bae-9555-0fb544ac927b/chicago_title_land_trust_orland_park.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e592faf6-6be3-4c56-bbf8-58b613f61319/stihl_chainsaw_owners_manual_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09fce3b2-9eee-41d1-8bd7-815344c308e7/livro_so_cipriano_capa_preta_download_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/040e40b4-813a-4f5c-b848-b9638b025744/blood_type_alleles_worksheet.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

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDBB 5436 bytes
SHA-256: 3a2a7b3b2cae2fefedfdbbb61648050edbc54f7fecc01267b83cc5c5ac72c59e
font_01_sfnt_off0000e067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE067 11040 bytes
SHA-256: 244e872f8bd4b1166ef9a66b5c2dbfca58631fa9342f09e90a31f551804c16db

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