Malicious PDF — malware analysis report

Static analysis result for SHA-256 df3d7c468a43f881…

MALICIOUS

PDF

62.3 KB Created: 2021-01-05 17:13:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b03c64481805f527547a691cca7d0cd0 SHA-1: 88cfb690ec33ae2c62dc5ead6625a5654cd3fc00 SHA-256: df3d7c468a43f881e961b58706d794340119590875b2cc47e9823f577da4070f
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although the document body is heavily obfuscated, the presence of a malicious URL is a high-confidence indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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/123?utm_term=decoding+the+genetic+code+worksheet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4476273/normal_5fb25b4f6ba44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366982/normal_5fa3e891f361e.pdfIn PDF document text
    • https://cdn.sqhk.co/sivunukiwe/8aicfvo/netofusabufunetejola.pdfIn PDF document text
    • https://cdn.sqhk.co/rawerusiwala/ha5jdjf/36511736966.pdfIn PDF document text
    • https://cdn.sqhk.co/sewiboveso/igBoDjc/kavaxawutufebud.pdfIn PDF document text
    • https://cdn.sqhk.co/fasaparoba/ihmhigM/relotapedanilulow.pdfIn PDF document text
    • https://cdn.sqhk.co/pemejurove/fXkieU1/pifawagopabuxe.pdfIn PDF document text
    • https://cdn.sqhk.co/mogidamiko/jifzEYr/great_white_shark_wallpaper.pdfIn PDF document text
    • https://cdn.sqhk.co/duvapegoleva/c2TFQid/vested_account_balance_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/zegofurop/cigyBhj/clock_change_2020_usa.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/258321e8-7556-4cb3-94aa-e9600b4926ce/zaxikowokojezapos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6efc16dc-357f-48b7-a8c3-b12dffcf4c10/lujubimiwebuvozasufalukax.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/eths_bell_schedule_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77fc7154-d388-4854-b5a2-ba322ec353e2/78192501743.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/formative_assessment_strategies_for_every_classroom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b934ab5e-42f7-4b82-a87f-5ee0871689b6/26428326151.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_off0000b8af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8AF 5116 bytes
SHA-256: 5b8ae93834c89c09e1da9d69f14cff1012db8e6aed20961fe34ee04f8c7d8fc1
font_01_sfnt_off0000ca2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA2A 9964 bytes
SHA-256: 0cd1108449bffbba493838b7755f302fd1b21b9416b6f0c8d4e22b6516397fe8

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