Malicious PDF — malware analysis report

Static analysis result for SHA-256 68c4afac825b911e…

MALICIOUS

PDF

67.2 KB Created: 2020-11-23 12:21:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 362be6e9018b954aefa4993e9e22e76d SHA-1: 1d873947a9f032025666185745ebf82075263480 SHA-256: 68c4afac825b911eb2d0c01286869338b92f03862a3fb8ba64d572b197c9cc37
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple critical heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be a lure related to a movie rating, suggesting a phishing or social engineering pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gettraff.ru/123?utm_term=a+cry+in+the+wild+movie+rating
    • https://memarexegota.weebly.com/uploads/1/3/4/3/134366516/704270b8d84467.pdf
    • https://digafixi.weebly.com/uploads/1/3/0/7/130776371/5c449b3b0cd.pdf
    • https://cdn-cms.f-static.net/uploads/4417414/normal_5f965810ecc96.pdf
    • https://cdn-cms.f-static.net/uploads/4470205/normal_5fb378661f6ec.pdf
    • https://cdn-cms.f-static.net/uploads/4390681/normal_5fb81c5ed1205.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pukiza/gst_percentage_list.pdf
    • https://uploads.strikinglycdn.com/files/65caead1-099a-48e8-abb4-079db476f54e/vulugadadobitosokufexad.pdf
    • https://uploads.strikinglycdn.com/files/09215f9d-9630-4994-8f8b-63fe0eac26fc/kugesi.pdf
    • https://s3.amazonaws.com/tetofamuxulil/kumudefobowu.pdf
    • https://uploads.strikinglycdn.com/files/604e27c0-71c0-474a-9d37-b21639be3062/jekuxafolurel.pdf
    • https://s3.amazonaws.com/debamijizozexo/telugupalaka_avatar_movie.pdf
    • https://s3.amazonaws.com/donarepemi/boxulap.pdf
    • https://s3.amazonaws.com/warapagefasovi/pisad.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_off0000c8c8.bin
cb41b7289234efe889abb9919800ec6354a02f6551d07c5e66d9744386d83078
pdf-font-stream PDF embedded font (sfnt) at offset 0xC8C8 5416 bytes
font_01_sfnt_off0000db26.bin
9be6e4cf8dbb5e5f46961ed0de88945c85cc7e8d78d81005e126b05db9205250
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB26 10824 bytes