Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7063297ccb9f696…

MALICIOUS

PDF

151.7 KB Created: 2021-02-25 06:34:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 194a129143ac9ed6cf482e27d54a31a6 SHA-1: 8dbcb2136ede36c31a03df81f4214f7bf6fa135b SHA-256: f7063297ccb9f696ad4c175061dc922420894bca6f2a00288a3270482575068d
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links pointing to known malicious redirectors and disposable hosting domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing lure, likely attempting to trick users into downloading further malicious content or revealing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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 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://crophysi.ru/123?utm_term=binomial+theorem+calculator+casio In PDF document text
    • http://rollernefritmassage.xyz/2868789687t8a0.pdfIn PDF document text
    • http://flipping-car.online/monster_prom_pr_agentk5rg6.pdfIn PDF document text
    • http://fragcups.com/display_action_sheet_swift6oj8s.pdfIn PDF document text
    • http://japancar-sib.ru/xofotewutevaxojuq2h9l.pdfIn PDF document text
    • http://opensol.xyz/908925842512rlj3.pdfIn PDF document text
    • http://zexaribamemavi.sportsontheweb.net/suvuj.pdfIn PDF document text
    • http://greatmasters.biz/22194584830mjpwp.pdfIn PDF document text
    • http://thedefenseforge.com/lenovo_g50-45_80e3_chargerkw6ja.pdfIn PDF document text
    • http://vuvulusigi.scienceontheweb.net/zipupozipuxinatiwinisada.pdfIn PDF document text
    • http://vertigoa.online/how_do_we_know_the_bible_was_written_by_godlaium.pdfIn PDF document text
    • http://conicppjry.bid/kenafaxowudevonasoloniwig58prh.pdfIn PDF document text
    • http://flathead.us/firogirurikimezusikosidtuln.pdfIn PDF document text
    • http://presente-top.store/how_to_get_star_on_ms_drivers_license_iowamayma.pdfIn PDF document text
    • http://rivozuzeno.mywebcommunity.org/what_is_the_formula_for_slope_between_two_points.pdfIn PDF document text
    • http://bullbananavannaone.xyz/what_is_a_six_sigma_black_belt_worthu6adk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0002185e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2185E 5088 bytes
SHA-256: f8e698e862c6dcf2abab83f5caeba02da84bd53f30ab8fc1788f59f3c5837464
font_01_sfnt_off00022974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22974 11640 bytes
SHA-256: 983375673967ae26f5b13fe78f5c3255ebc77fc16f3fdc02a36fd9ba644fb14f

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