Malicious PDF — malware analysis report

Static analysis result for SHA-256 a572610949c70770…

MALICIOUS

PDF

68.4 KB Created: 2021-01-03 02:45:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: eb4fe144e4b5e99bd9755a728348490d SHA-1: 6a04725efb4a042a2cdc9a271e69274535a27a8b SHA-256: a572610949c7077031f5a9e167a78c42ac1aa9c3d3f1e892feb13a85ea713b17
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • 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://ggtraff.ru/shook?utm_term=ivan+the+terrible+movie+2009 In PDF document text
    • https://wikabolodaj.weebly.com/uploads/1/3/4/6/134648749/790990.pdfIn PDF document text
    • https://cdn.sqhk.co/mugapowejog/iasBeig/twist_crossword_clue_dan_word.pdfIn PDF document text
    • https://pokadomefodifug.weebly.com/uploads/1/3/4/4/134478187/59accc593.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/fenatagazise/40072927133.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/thomas_bayes_theorem.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/delta_airlines_flight_arrival_and_departure_information.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/74819766795.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc2ec613-76ba-4b45-be2e-da97572abb9c/velatosovatijida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1a41ca8-640b-45f3-85be-f679d9f29748/41328151429.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e93d14da-862d-4cde-b524-51eff29f6a60/98484591164.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/zuwanodiveviluzewos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca0fe222-1e68-401f-a100-5af2085a70fa/i_love_hue_too_confusion_16.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/24940734364.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/709f68e0-8e15-4a50-97f5-410dc06827ab/42422845869.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24f61168-0b54-4cd9-90dd-0e19ca72debc/29063406954.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_off0000d160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD160 5316 bytes
SHA-256: 110cf486791042805ae896d2accf3dda955bc7d236fe7f1da152043f06a617bb
font_01_sfnt_off0000e34a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34A 9928 bytes
SHA-256: 399966510081791218930adaa6c9af11f154f42bb95310c9c6b57fe592f8a078

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