Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bede0d429fdea43…

MALICIOUS

PDF

68.8 KB Created: 2020-11-20 05:11:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 2d95a298dc7a69055e34abe41f8546ae SHA-1: 7055d6067d713c9025cd6e991302a111fb05b4f9 SHA-256: 0bede0d429fdea436fd6e727d31cb9971760ce1d3b39db444faf7a30d0d5f2c9
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many of which are embedded within the document's structure, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. The presence of embedded URLs, specifically the one pointing to 'traffset.ru', further supports the conclusion that this document is designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://traffset.ru/123?utm_term=papa+john%2527s+pan+vs+original+sauce PDF link annotation
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/03aef64.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xuzed/free_browser_vpn_for_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/89984896269.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/vufutivodudewubo.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/bally_total_fitness_gym_membership_prices.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/mulapemomegatax.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/sonic_blast_nutrition_information.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/how_to_code_tic_tac_toe_game_in_python.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4338371b-f824-41ab-a8c7-2202bc12e593/58564096225.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/72785777987.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/year_8_digestive_system_test.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/ielts_speaking_part_2_questions_and_answers_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/ceftriaxona_sdica_bula.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/83813398308.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_off0000cf9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF9A 5364 bytes
SHA-256: bf015a16c3bbe6ac63f60644b299a5032f74e50b209a03dfae07cbcdfba0cffb
font_01_sfnt_off0000e1ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1EE 10812 bytes
SHA-256: c9d2067ba2f3fdee98daea8c0198ec58567c2e991e3762d23387e75856d7500f

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