Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc83f0ade7d3a4a7…

MALICIOUS

PDF

64.6 KB Created: 2020-11-14 17:55:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0268e1c37e5ab6afb4aaf2530cc9110d SHA-1: d463d75c27acbb1c7f20a7b733333c9c02068e25 SHA-256: fc83f0ade7d3a4a738e97591d520730f15d410efe8539ee05cf885036ba279cb
294 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF file exhibits malicious characteristics, including linking to known malicious redirector infrastructure and employing a link farm strategy. The document also contains lures suggesting the user copy and paste content into a command-line context, and provides password instructions for an archive, indicating a likely multi-stage attack. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://traffmen.ru/123?utm_term=reset+gopro+wifi+password+session In PDF document text
    • https://toxavikosas.weebly.com/uploads/1/3/4/4/134437834/9b213bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457296/normal_5fae8d397197a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413473/normal_5f94afef1389c.pdfIn PDF document text
    • https://soxajenukaru.weebly.com/uploads/1/3/0/8/130874283/c88f9ecd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422628/normal_5fad26d64bbb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374211/normal_5f8edf3e18a9e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/594cf271-f73d-4a31-9499-e8e36bef2936/79756052584.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/ff14_summoner_quest_giver.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/gk_capsule_june_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/pagitarugusij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77effce7-7525-491a-b1b7-48adb6db7094/vowawejejun.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/gloomhaven_rulebook_download.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC098 5276 bytes
SHA-256: da64b3e347121c355f6518b09d1862d41c08148503cccb0f8af118b4ae6de795
font_01_sfnt_off0000d2b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B5 10336 bytes
SHA-256: 5b0091cf12b08dd69d8bd85273dc6ac319a1a1dd2f99be6d38e6c2ec531134c2

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