Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fa09447a1e2dba6…

MALICIOUS

PDF

75.0 KB Created: 2020-11-25 14:41:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 48d3235b22fac3cc7da488efb57a04d8 SHA-1: 2aa1e8c5315d43f72d8c2fcad825f03ca000e89c SHA-256: 5fa09447a1e2dba634ae12da10cbcff4a0274c5788e7fb3f1e7906d2af24941b
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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=secrets+of+grindea+pet+guide In PDF document text
    • https://dinoromakutaxe.weebly.com/uploads/1/3/4/4/134479472/nebarob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366623/normal_5f96c2df54832.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366976/normal_5f8a471921dff.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/xamabumevibiguzap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfa6ea51-6c7a-4173-8341-d7f5557f5472/zasunikenasoperineb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ec46201-05dc-4ae1-8b1b-2760c1287edd/narimubupomexapasaripezuk.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/vw_beetle_performance_parts_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f78f83f8-54fe-4d1d-a5ee-c4b9549ccb8a/ds3_crystal_magic_weapon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b84bdcda-7b3e-46d3-81e5-b5261af946a4/kadito.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0935b9db-7967-4a5c-94a7-46f52f01fa09/54870024645.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF68 5396 bytes
SHA-256: febdf06ace0eb91126f60cdd7bc0fbb20b56d5ca9474582b90bc687b5d2cbeed
font_01_sfnt_off0000e1d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D0 12308 bytes
SHA-256: bef518441bcbf5bab075f00e8dc333529b74965adbdb030966f72f0fc8d1b77a
font_02_sfnt_off000109f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F9 16164 bytes
SHA-256: c70b4877c7ec89dff5e318d7f0d6db7744657cb66f226087c606480b14a4effe

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