Malicious PDF — malware analysis report

Static analysis result for SHA-256 570ea15c2f3df076…

MALICIOUS

PDF

72.1 KB Created: 2020-11-11 13:26:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 9279f977a930dafdf7cd7e872b18efec SHA-1: 184a830bf7d213becb1e743bdbd206a6cea57d88 SHA-256: 570ea15c2f3df0768fa783c9fe13686368abd5fda4f8d48600e34968846b73d9
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'download', and a heuristic also flagged a visual download button lure. The primary IOC is the malicious redirector URL, which is likely used to serve a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gettraff.ru/strik?keyword=gold+ppsspp+apk+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4450724/normal_5fa4ad9c9fdeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458635/normal_5fa0e027c51bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393179/normal_5f8f3935d0ad5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415302/normal_5fa7183c26ea0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454556/normal_5fa0d2cfaccd8.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/3f253d07-b6c7-4975-95fd-e2817d0f2225/specific_purpose_statement_for_a_persuasive_speech.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73a3f7e2-3b6b-4dcc-8134-31982c19c38e/70093566390.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da9a578a-157b-4d39-a69d-a80cb2c65855/halley_s_bible_handbook_download.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/a_storm_of_swords_download.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/pebigerukurosejepegan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba43f636-c53d-490b-beef-2ae2d2015eed/alabama_trivia_crossword_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffe76995-d3bd-441d-9399-b5b60108cfb5/97297491793.pdfIn PDF document text
    • https://s3.amazonaws.com/digigitusuduk/xekilajopuxusirafefekef.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/15104346386.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/20175871477.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_off0000db7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7E 5044 bytes
SHA-256: 48d306895107fcc077d0b6bcd4bb6c2584eded6164c96f1f6b13eaf04ec6bc44
font_01_sfnt_off0000ecd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD2 11476 bytes
SHA-256: 0b7a17ac96bd3287f0a60fd39e52b73f64738edd1e13fee407bdc84cfca2ff2d

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