Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c8ec8f41e5402c0…

MALICIOUS

PDF

71.5 KB Created: 2020-12-14 05:50:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 813db915c4d44bc453bbd74a0c717dd7 SHA-1: 84504abd7d83dcf53e230f37ab66c5d84ce092e3 SHA-256: 5c8ec8f41e5402c0fa5a67f240eb250e4db3fb002406e0fb5dcf4475ddd0f8ba
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/123?utm_term=shayzien+house+favor+osrs'. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=shayzien+house+favor+osrs In PDF document text
    • https://cdn-cms.f-static.net/uploads/4394061/normal_5fb7c2cd6f67f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376375/normal_5fbd41ac881db.pdfIn PDF document text
    • https://boxavukexuzar.weebly.com/uploads/1/3/0/7/130775797/poluxitutemilawav.pdfIn PDF document text
    • https://garisufusomepis.weebly.com/uploads/1/3/0/7/130740000/wojuwaruzulopav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465687/normal_5fbb390bf3fc8.pdfIn PDF document text
    • https://jafedemigizol.weebly.com/uploads/1/3/4/5/134588438/wurof-lofopowa-saduto.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/2496ca5d-bd8d-44c7-8a17-5861e5b388b1/22012164191.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/tafegijaxe.pdfIn PDF document text
    • https://s3.amazonaws.com/rotafasaniz/tuzifabepigezop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0103fac4-371c-4935-8790-3ecb72143133/vay_bama_gelenler_2._5.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc578abd49dd1244753261b/t/5fd6792e102ca46975e6a2d4/1607891246112/blue_bloods_book_series_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD4B 4940 bytes
SHA-256: fcf3c2da82001d75004bae2c908e514137ffe9db688852221898aa7a82901a7f
font_01_sfnt_off0000de15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE15 11024 bytes
SHA-256: 54099c98a5d9c9f340d3fd446c0486b4d3b83c7e402099365301fac23bec48d6
font_02_sfnt_off00010344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10344 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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