Malicious PDF — malware analysis report

Static analysis result for SHA-256 54e4dbecdb70c3f4…

MALICIOUS

PDF

86.5 KB Created: 2020-11-21 11:52:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: fb2e46f707750affa2927dfdad759b15 SHA-1: d8048023138087c45ddb9aff879c4496e8be73b1 SHA-256: 54e4dbecdb70c3f42a0493fd24c075416d7ad03c97b7df749f75d4e92c0bb15c
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://cctraff.ru/aws?utm_term=actus+reus+and+mens+rea+examples+pdf In PDF document text
    • https://xifugewelude.weebly.com/uploads/1/3/4/3/134353264/wutoxipixijozeximes.pdfIn PDF document text
    • https://kajefota.weebly.com/uploads/1/3/4/7/134766701/nonopu.pdfIn PDF document text
    • https://dunujamovexen.weebly.com/uploads/1/3/4/3/134361976/lafamojipopelagobi.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/godewumazek/rojamawem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c5cac5c-dccc-4b98-a61f-ad7de95e5b1e/dogulaweguroxorirebib.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/japow.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/ruriba.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/14247158476.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1d5daaa-bb66-4cc1-9da9-1efae24d02d2/sketch_gothic_bold_font_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/11202170359.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/jitimojoza.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7F 5360 bytes
SHA-256: fb9488de5bdb0aa17d63167f607d6c74e723c8f31e1635afe5e28775eddcd59f
font_01_sfnt_off000110a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A6 11400 bytes
SHA-256: 02532e7bad32ac0450ca5637753c368e39c97354d75374323d3c8d6f69c6c3d0
font_02_sfnt_off00013714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13714 16316 bytes
SHA-256: a2d115f0f97de8ad79ff358ffc77a456361852623a062a0fc59f2585ee3261ce

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