Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b91706288ebee39…

MALICIOUS

PDF

59.6 KB Created: 2020-11-16 12:41:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba4aad209674e5280828f81ff62a3121 SHA-1: 7721bd483bfeb5940babda2b0413e2fc9595a550 SHA-256: 6b91706288ebee390a6226e31b7c31505ccd0686f9264dc20d76c748a5b8b705
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link to a known malicious domain and a link farm. The ML classifier also strongly indicated maliciousness. The embedded links, such as 'https://ggtraff.ru/123?utm_term=polar+bear+adaptations+video', suggest an attempt to direct users to potentially harmful content, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ggtraff.ru/123?utm_term=polar+bear+adaptations+video
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/zanadutut_wexudafenatogun_jetomefoja.pdf
    • https://xazotanosiwe.weebly.com/uploads/1/3/4/3/134314219/waxunitu.pdf
    • https://kesevaze.weebly.com/uploads/1/3/1/3/131383297/10c7b8.pdf
    • https://xitukuwelup.weebly.com/uploads/1/3/4/3/134340625/6391395.pdf
    • https://zozolesib.weebly.com/uploads/1/3/4/6/134631165/bital-dagitikurawov-motatuguxu.pdf
    • https://rudiduwusoxu.weebly.com/uploads/1/3/4/4/134445317/pobaxemowuniz.pdf
    • https://vufepuxo.weebly.com/uploads/1/3/4/5/134522835/jigifebet.pdf
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/rodoxoziniz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sodoxi/9322958570.pdf
    • https://s3.amazonaws.com/pazovugal/4668373984.pdf
    • https://uploads.strikinglycdn.com/files/8cd9f8b1-63d1-41d5-ba3e-627d15aa48c2/27605095884.pdf
    • https://s3.amazonaws.com/posufij/urban_design_reader.pdf
    • https://s3.amazonaws.com/bojafazes/70740387321.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000af46.bin
c5b0c34845cafcfa50f810be73c048f48fc63b66c2835175c050909ab34957d1
pdf-font-stream PDF embedded font (sfnt) at offset 0xAF46 5156 bytes
font_01_sfnt_off0000c0d5.bin
5819aa85e78d29c44e27e38a2cbb2bbac14f4968cae6e3fb7810b618bcf77197
pdf-font-stream PDF embedded font (sfnt) at offset 0xC0D5 9608 bytes