Malicious PDF — malware analysis report

Static analysis result for SHA-256 67743927383b7f42…

MALICIOUS

PDF

80.4 KB Created: 2020-11-10 22:18:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 68cf5687a13588b7b2c3eeb795d2df0c SHA-1: 06e1ed8f9784a0901f01eabc68ccfd4e92e904f1 SHA-256: 67743927383b7f423494246cbfd3d95fccd770833e8122ba567c58b8b710963c
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://traffset.ru/aws?keyword=critical+ops+apk+mod+menu PDF link annotation
    • https://sorefikope.weebly.com/uploads/1/3/4/6/134664591/wexivupo-puxikozedub-nemubalizali.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409797/normal_5fa90c306f05a.pdfIn PDF document text
    • https://pilituxasi.weebly.com/uploads/1/3/4/6/134685590/ronubanorokot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_5f8722f5df299.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393034/normal_5f9a39a9db0c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446491/normal_5f9de867ebfa7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452594/normal_5fa4682a5e705.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/fowikorejodi/javelina_cantina_sedona_az.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62465ad8-d336-4ba3-bc1e-7de8b7c93fdd/60826217255.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d161e10e-5f32-4e78-85e2-f360d601e855/6591630083.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

Related samples 5

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD573 3316 bytes
SHA-256: 0529b0edad40106538cfb570cf575a8fc223025da5f834aba082e1d20faad7b1
font_01_sfnt_off0000e178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE178 5188 bytes
SHA-256: 3875c5a66170eaf77dcbd1b54b327abdadc82c16d729b0a0637c111cc60dc16b
font_02_sfnt_off0000f303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF303 14160 bytes
SHA-256: b783ec6959176d450d134c3ce4e892d4b5ec8a94e14401277b49b008247b71ad
font_03_sfnt_off00011f01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F01 16136 bytes
SHA-256: f21fce5986eb249815cb96d9bfbb6356a2073fd12dab3691d9fa6fa5acf7a8c3

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