Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e4974456a2e9e6e…

MALICIOUS

PDF

84.5 KB Created: 2021-01-10 23:46:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 1ac5b63075d9df655e2c2312c62b3765 SHA-1: e7c30a5947a679aa7e7fc30832710d6e8f5cf331 SHA-256: 8e4974456a2e9e6ee8181bd2525c05309476bca1fd833ec9cdd17b5c42705674
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. The presence of a large number of external PDF links suggests a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or malicious redirection attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffmen.ru/123?utm_term=fate+card+collection+skyrim In PDF document text
    • https://site-1176739.mozfiles.com/files/1176739/65997463598.pdfIn PDF document text
    • https://site-1176767.mozfiles.com/files/1176767/descargar_uphill_rush_2_usa_racing.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369928/normal_5f88ab02b132d.pdfIn PDF document text
    • https://site-1172834.mozfiles.com/files/1172834/49346042913.pdfIn PDF document text
    • https://site-1173660.mozfiles.com/files/1173660/read_along_french_books_online.pdfIn PDF document text
    • https://site-1168059.mozfiles.com/files/1168059/gimopiwutuvejifejaramew.pdfIn PDF document text
    • https://site-1174269.mozfiles.com/files/1174269/pac_man_scratchers_how_to_play.pdfIn PDF document text
    • https://zarojapejafaro.weebly.com/uploads/1/3/5/3/135347044/wudalid-fodomet-xinisejogipekow.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/lakadutof/sql_server_2012_developer_edition_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/45878281047.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/97175270835.pdfIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/7743514531.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA9 5204 bytes
SHA-256: 821e73ad7f61561c20c64b40e9f30d8518855df55cedce92828bb8c798044b65
font_01_sfnt_off00012055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12055 11124 bytes
SHA-256: d72d6b7e341843dbbe50b333a49b91d66c1ebb97fd449cc6748b89da944482c8

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