Malicious PDF — malware analysis report

Static analysis result for SHA-256 745c3932a20787b7…

MALICIOUS

PDF

76.5 KB Created: 2021-04-04 12:47:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 41a9270a6c58e819aabd848080b9d89c SHA-1: 5aafbc5b124ae9d5cf888e4245b185ad6c962c68 SHA-256: 745c3932a20787b711746da534321a7d388995aefe097e714098f5b0312f500e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a 'link farm on disposable hosting' and flagged by ClamAV as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, suggests a lure related to 'connection games pictures with answers pdf'. The presence of external URIs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/123?utm_term=connection+games+pictures+with+answers+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470964/normal_6013db6306699.pdfIn PDF document text
    • http://lemiritafuwab.22web.org/dejugemakonek.pdfIn PDF document text
    • https://cdn.sqhk.co/derepinejabi/jiijgjd/texas_tech_tour_guide.pdfIn PDF document text
    • http://homebig.space/drum_pad_machine_mod_apk_cracked6bgh3.pdfIn PDF document text
    • https://cdn.sqhk.co/lapefuxolu/gejhfhc/design_studio_graphic_design_invite_logo_maker_logo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415934/normal_602623874372f.pdfIn PDF document text
    • http://lukaruji.iblogger.org/english_malayalam_dictionary_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529780/normal_605a0e0baf6cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486200/normal_6018aeeca2c75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487200/normal_60696f3918d8d.pdfIn PDF document text
    • http://doordash.link/the_magicians_season_5_cast_imdbabytw.pdfIn PDF document text
    • https://cdn.sqhk.co/javabufe/iHX5Nig/58570393933.pdfIn PDF document text
    • http://ideaita.fun/xuxenixuxoneriwototatemi85a4o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417806/normal_6021a4ad13f19.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376120/normal_5ffbe4921ecab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nepogewapiw.epizy.com/jodanerudotejubeb.pdfIn PDF document text
    • http://juxitogepamuwo.epizy.com/foraging_theory_stephens_krebs.pdfIn PDF document text
    • http://tabonozekes.epizy.com/92509788892.pdfIn PDF document text
    • http://fibubaxuvuvixik.epizy.com/visa_on_arrival_application_form_thailand.pdfIn PDF document text
    • http://wuwomuwudawim.epizy.com/gujekanibumavefesegevit.pdfIn PDF document text
    • http://pigasupozev.epizy.com/1949705566.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC35 5536 bytes
SHA-256: 2833ac6c7133cc25c821e74f8e5b62ace0857b95923161d0a406f4a52a766460
font_01_sfnt_off0000fef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF2 10892 bytes
SHA-256: c0df8aeb71c9e221cf9d79cae8a8e0c7b14fcb9aebd17c64d4b1d025db828b6a

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