Malicious PDF — malware analysis report

Static analysis result for SHA-256 20fa6e9feaeae360…

MALICIOUS

PDF

67.6 KB Created: 2020-12-16 17:42:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6b81061e149f6d1add6e0cb195df2e17 SHA-1: e5dffd070ef655f696ac4e488b0dd4cbfe1a6096 SHA-256: 20fa6e9feaeae36032faf6751441ee988cb618c5544188af0e9f792c3871a744
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains numerous embedded links, with one pointing to 'traffnew.ru', suggesting a phishing or malicious redirection attempt. The 'PDF_SEO_LINK_FARM' heuristic indicates a large number of external links, likely to manipulate search engine results or direct users to malicious content. ClamAV detection and ML classification confirm the malicious nature of the file, likely as a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffnew.ru/123?utm_term=hunger+games+cinna+death PDF link annotation
    • https://gazezujebek.weebly.com/uploads/1/3/4/8/134881616/kerejo.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/2bc22e66-9172-4a52-b1f7-9777653d7eb4/20578903294.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc53be8ab79f442f245f56c/t/5fd1214710275a0b908ed472/1607541064548/fun_things_to_do_near_philadelphia_airport.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/015137dd-aea4-41ec-82d0-f5e741a5109e/48374589927.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7f254e5-2ae6-4dba-89f4-4d0b14fc7ab9/61455374097.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2149b20-cce2-43d5-ba98-00c01ceeeae4/wetusa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e0f5a75-795c-47ae-9c8e-54303b60d96a/sodisefu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8f4023e-110f-49de-bc92-0f93cc8b9d07/notario_publicos_nogales_sonora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d430569-cd87-4f00-8bea-40322b36a6e4/zabijajotadizeveto.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2902d1452f90b7fefcf7d/t/5fc9a51681b71b4085919d5b/1607050522629/warlord_games_black_seas_rules.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efce4056-5303-4fd8-b354-2e3ecbe0777c/3986262231.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_off0000caa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAA1 5284 bytes
SHA-256: e4dd1beee6ea516a641f8af4533464fdc242d981b3e7d6d6ba62de662ab95f40
font_01_sfnt_off0000dc6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC6D 11140 bytes
SHA-256: b0576b7db358e3c445908f8e5b10c22094c741ae18736ce24f458fb5d4954318

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