Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7284b8e95fc69de…

MALICIOUS

PDF

104.9 KB Created: 2020-11-17 03:47:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2e7a5219d7de429aaea2b0ae1a88d01c SHA-1: 987638caed4528783c65a32add23cffb52ced375 SHA-256: c7284b8e95fc69de856d96682c305f5647c696ab5ecfd16d5a26611de55ee0fe
214 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 embeds a large number of external links characteristic of an SEO link farm and 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 0.9993

Heuristics 5

  • 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.
  • 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/strik?utm_term=dir+en+grey+vestige+of+scratches In PDF document text
    • https://vonojatu.weebly.com/uploads/1/3/4/7/134711894/2392a3f39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366949/normal_5fb03dec48e43.pdfIn PDF document text
    • https://nubipejima.weebly.com/uploads/1/3/4/4/134480583/pawibaviwa-fifabidupizujev-bepolonokirev-revurapuw.pdfIn PDF document text
    • https://jamafijuzu.weebly.com/uploads/1/3/1/4/131437216/2568472.pdfIn PDF document text
    • https://zoxetojasag.weebly.com/uploads/1/3/1/4/131437223/1a822d957670839.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403273/normal_5f9b156114597.pdfIn PDF document text
    • https://vedakevuvapi.weebly.com/uploads/1/3/4/0/134013486/nagerawolakeji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384310/normal_5f93bce2e33e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393362/normal_5f938fac4a503.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b79745c-3181-4223-bec7-56a0cb1306b1/dodapimozefoziwikiri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62a7ac7f-243c-42c3-9f19-00b34bb3d8d5/dudukugokekenukafav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb918391-85c7-4994-aab5-74f3de5bb4e0/19256708816.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b013e745-8400-468a-b3a4-530eec2bf2ae/civil_engineering_drawing_by_m_chakraborty.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f912ee5-cdcb-4ebe-9fc8-565672d14ea1/3068766079.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD69 22172 bytes
SHA-256: 52cbbc53ef53dd5bdc47423de82ac7a7360caf453a96e8bfe96cfa0be68e3b63
font_01_sfnt_off00012389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12389 5272 bytes
SHA-256: c25f95b61a0bb031e9bacca6b49061d5c34688051bcdc02022798c04a8f9656e
font_02_sfnt_off00013586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13586 11536 bytes
SHA-256: ef7476402ef1f9f664e7acace8396fb008d046b09b59d896282bd82b384eae4e
font_03_sfnt_off00015605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15605 12136 bytes
SHA-256: 48f51b2f275871fab359cc79a660845a147a0d5fd454df1857a059c693cf3a53
font_04_sfnt_off00017eae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17EAE 16220 bytes
SHA-256: 9ce88dc8122b837ae39262df06b6a026cde620591b089673da0d6cdacc399793

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