Malicious PDF — malware analysis report

Static analysis result for SHA-256 b85e300ee25e1cbe…

MALICIOUS

PDF

77.8 KB Created: 2020-12-18 23:25:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d0d5cbaf89030cbc42ee5b6ae0f55ed7 SHA-1: edc253940555f49f457bed8835d0562648ee676f SHA-256: b85e300ee25e1cbe34dc759dffeeb6255e76fad27ce6e093b3112f703e2c8d0b
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier. It contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The document body is heavily obfuscated, but the presence of numerous external links suggests an attempt to direct users to potentially harmful websites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/strik?utm_term=avoidance+avoidance+conflict+marketing+example In PDF document text
    • https://cdn-cms.f-static.net/uploads/4408197/normal_5fb034584c8ca.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/jegaka.pdfIn PDF document text
    • https://pafetuvuwube.weebly.com/uploads/1/3/4/3/134321561/9645795.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469847/normal_5fbc0d97b18fb.pdfIn PDF document text
    • https://deronabopopunol.weebly.com/uploads/1/3/4/7/134728657/b8e714c.pdfIn PDF document text
    • https://duxoberadu.weebly.com/uploads/1/3/4/7/134718286/kivogojakaxezema.pdfIn PDF document text
    • https://fekebejoluxoji.weebly.com/uploads/1/3/4/3/134309121/dikusutezomamepo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc18f8d0a2757459be7919f/t/5fcc8921fe657040d58b7931/1607239970029/best_free_boom_cards_for_speech_therapy.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/45838002805.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fcdb3dc-9b7b-4657-9676-ea491b40395b/kakevomolitimatijanedepa.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/rixaku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35e48ffe-2832-4d63-845f-99d20862dc3f/architect_scale_ruler_worksheets.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD7C 5480 bytes
SHA-256: 667dafcb417c7cf0271101516ebc7e3420a44cb3aa0d4bba0edd91c21f03c91a
font_01_sfnt_off0000e012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE012 4976 bytes
SHA-256: 96d5a0f56b23d1a59cf83337a1841826aa9b4ceb005839bbf1c6a0462edbdd03
font_02_sfnt_off0000eee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE7 11204 bytes
SHA-256: 1d1678e6aae205c1891cce09b7dc036ce1cbfb67655066f438796d0aae2f3ac0
font_03_sfnt_off0001149e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1149E 16168 bytes
SHA-256: 794d8cc090a449e0d460036171b2d5b2c749cb0dc3f17972c44626ada68ee3d8

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