Malicious PDF — malware analysis report

Static analysis result for SHA-256 c747a2ffbc87a8c8…

MALICIOUS

PDF

70.2 KB Created: 2020-12-19 12:39:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 4be83cb037062d982d6c46fcf8a72adc SHA-1: a6332a4583f03a9c9841a5dcb845435e187c84c9 SHA-256: c747a2ffbc87a8c8c310273763b56628d6a920eb44f149e00a0454034205ae81
194 Risk Score

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/wb?keyword=video%20ringtone%20app%20for%20android%20free%20download In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bidivo/catalogue_materiel_electrique_schneider.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/free_sadlier_vocab_answers_level_b.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ca59b25-e6f3-4473-b5f6-feef1413a9c0/tokof.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcee8fd3f7a7c1e6e8875e2/t/5fd67a233ebe041631638654/1607891491874/14652140920.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e692fcca-9d29-4208-a600-f07ba30c344a/45685865098.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d794cb7b-ae90-46cb-a87e-b3c07e9297be/gujowojebedesimedawa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27658643-9094-47c5-9c92-82879edf6d5a/rijedosudilep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e745df8-a4af-4c43-8c34-1d447ab0a492/adam_marcus_emory.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc70bacfc603311fbf81dbc/t/5fcce9b1cded405bb8d8f73d/1607264690297/unicorn_comic_strip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a0865da-039a-4379-b3ef-a4245717a421/jerusalem_new_york_berlin.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffb1ae9fc3622d51d09b9/t/5fc25ee161e25426e184b9e3/1606573794120/before_entering_an_intersection.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d853b00-0728-488b-8dc6-c0ba9bf63f1c/dga_rate_card.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88822b74-d5b4-44e1-aeb2-3f2a61119e7f/the_giver_chapter_14.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2950d9f-2c0a-42ba-8896-8d5cd5364be1/musini.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0dd99d104e5f153002ef/1606225369976/periodic_table_trends_quiz_and_answers.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_off0000d624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD624 5088 bytes
SHA-256: 78da5965dedb1aecc99cddd6e70646e28bf1a49b818a13d41234f43ad19e2cec
font_01_sfnt_off0000e798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE798 10648 bytes
SHA-256: 80c13a098fafd5a705c617146c4b0dfaf4d6aa7749c24626e83d89f1425835bf

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