Malicious PDF — malware analysis report

Static analysis result for SHA-256 46af9706bafcd527…

MALICIOUS

PDF

75.9 KB Created: 2021-05-16 22:09:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: d5e96d759251b735007754605968161a SHA-1: 7aa643b15fee1c40c0f7a83e97d7256e4208175c SHA-256: 46af9706bafcd5273fc1ab826599bb9b9fc1c913bcf47b1699da31355a9abb1e
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document body, though heavily obfuscated, contains references to '1998 chevy s10 service manual pdf', suggesting a lure to trick users into downloading further content. The presence of numerous external URIs, many hosted on disposable domains, reinforces the link farm and potential phishing attack vector.

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://maypoin.ru/strik?utm_term=1998+chevy+s10+service+manual+pdf PDF link annotation
    • https://cdn.sqhk.co/tatolodam/gcghigw/wadoxilegilajapivu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410965/normal_5fe66403d248e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496816/normal_5fd03bbe339d3.pdfIn PDF document text
    • http://fitokapss.xyz/woodworking_bench_vise_hardware0ptvx.pdfIn PDF document text
    • https://cdn.sqhk.co/tasokuxu/dOjeWEQ/room_escape_contest_2_level_29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416305/normal_604ce65473cae.pdfIn PDF document text
    • https://cdn.sqhk.co/jejefudebuxi/jjhj7jf/kepod.pdfIn PDF document text
    • http://sq11mini.com/kubugoruwbt0d0.pdfIn PDF document text
    • http://jumbochecker.com/basic_english_speaking_bookl3pcl.pdfIn PDF document text
    • https://cdn.sqhk.co/jututumogu/iahigjh/texas_longhorns_football_players_2019.pdfIn PDF document text
    • http://expressvpn.store/nipulufemezivulawijesuma7qvxr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470681/normal_601aefb4cfdbf.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/a54b9358-ffd0-4f4c-90b8-0298cf2504d5/mary_poppins_chimney_sweep_gif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df92e5b8-e4fd-4d63-92b4-c88af062b9c4/augustine_confessions_sparknotes_book_7.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/mozus.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/landscape_architect_cv_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6c7c073-650b-4acd-a97e-62f0cb454674/rukika.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49689076-7bac-4cae-b793-189fe78c03f3/nikon_af-s_dx_vr_zoom-nikkor_55-200mm_manual.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_off0000eb54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB54 6004 bytes
SHA-256: 637aca080bb8bb422f372ced08004d8ff292797db832db7d43afae622324af02
font_01_sfnt_off0000ffac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAC 10112 bytes
SHA-256: 30ff2d33de460fecdfb30a5801c64909f7ae8f113c4c893bf641a19e1280b0af

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