Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ad7bc8b5949a8a5…

MALICIOUS

PDF

73.4 KB Created: 2020-11-18 05:07:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 9b4690bd39ac68a57a92eaa86642f850 SHA-1: 6d383dddffa9c2429a44838fbe600a03134c8ab2 SHA-256: 7ad7bc8b5949a8a5fb913318e1c3f9f9da6ca71fcaa6dbe8d7d9c95244abdff6
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic firing for a malicious redirector link. Another critical heuristic indicates a PDF link farm, with one URL pointing to a PDF hosted on Amazon S3. The ML classifier and ClamAV also flagged this PDF as malicious, suggesting it's part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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://ggtraff.ru/123?utm_term=sanky+panky+3 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368244/normal_5fa0288144c8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426815/normal_5f9f2ebaa3db6.pdfIn PDF document text
    • https://wirukibit.weebly.com/uploads/1/3/0/9/130969322/b39844f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412996/normal_5f9d02c67ec34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372963/normal_5f99ca2e4d01e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365619/normal_5f883ea664ba6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404975/normal_5fad23bd50617.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376359/normal_5f924bb4ee221.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/girlfriend_activation_system_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/57145072237.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E6 4372 bytes
SHA-256: 580209d5b822c8318976ed1f97a259dad33eff0408611e6f178d762be926d501
font_01_sfnt_off0000e4b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B9 11224 bytes
SHA-256: 0fcd8f2972134fc67bb4b10bafaa16c7e836432a20dd5e6b7168cb8be7637e72
font_02_sfnt_off00010afa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFA 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

Open this report in the interactive analyzer, or submit your own file for analysis.