Malicious PDF — malware analysis report

Static analysis result for SHA-256 6523c9842d5b2782…

MALICIOUS

PDF

80.2 KB Created: 2021-03-14 04:00:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e892038d2217b3a3f75b461c21e59c23 SHA-1: 961ffd33dfbd587c46cd7fb8bd00a6d912bc1fee SHA-256: 6523c9842d5b2782583eeefdae1cc91859e7eeeb95e76c2b946f55f8baa511b6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://dafemum.ru/strik?utm_term=why+my+space+heater+stopped+working PDF link annotation
    • http://hookup153.fun/digirazekuvozixrtn77.pdfIn PDF document text
    • http://zexaribamemavi.sportsontheweb.net/motorola_e6_unlock_code.pdfIn PDF document text
    • http://tiktoktop.design/rexobesadexizogifiwqdtbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415304/normal_604ce71028944.pdfIn PDF document text
    • http://vefuvowew.22web.org/basic_racquetball_rules.pdfIn PDF document text
    • http://idealica-ufficiale.site/vebudakebafusyyk41.pdfIn PDF document text
    • http://tomogorman.com/how_to_increase_shower_temperature77ovq.pdfIn PDF document text
    • http://medebupima.sportsontheweb.net/should_i_upgrade_to_southwest_priority_card.pdfIn PDF document text
    • http://gusedori.iblogger.org/54613047016.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452382/normal_5ff25d6d10d16.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/4f60e70e-bfca-4f87-8abf-cd1261499d80/how_to_connect_motorola_bluetooth_headset_to_samsung_phone.pdfIn PDF document text
    • http://xatulebebulife.rf.gd/7551892851.pdfIn PDF document text
    • http://xutirekivob.rf.gd/ginuwoxoxeriwiganem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0426ba44-1f0f-453b-9629-1f0a4854f5fd/85381695403.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0008262-dcdb-4595-8bbe-634a77571b39/96531780032.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8a2f18f-5319-434d-a9b9-e45101cc2971/harbor_breeze_saratoga_ii_fan.pdfIn PDF document text
    • http://zefinut.rf.gd/partidos_politicos_mexico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c72317a9-7158-41ec-ac0d-3fc458703a8e/kefobuganijunadanafujoju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d90cbe18-98a4-4007-a3c1-c5b51936b2ab/91265269260.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7eb28fe3-4ed4-4e5e-80ce-1a39c1faefb5/baldurs_gate_2_enhanced_edition_quest_order.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_off0000f8f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F1 5728 bytes
SHA-256: c937ead5aa86579e84234989645c58ee12eabd5265d2d1de68b900dea4ab08d4
font_01_sfnt_off00010c62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C62 10868 bytes
SHA-256: 6ba083dc01e866a2ec71996e035119f27755633b1810a22e943f02c8c06f4a70

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