Malicious PDF — malware analysis report

Static analysis result for SHA-256 5434ce895c8ead8d…

MALICIOUS

PDF

79.3 KB Created: 2021-03-17 21:58:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3837bd2b2d2cbeb6b9c5560ac044448 SHA-1: ede0ffe22bc3655fed49b62b4cf9e6ccde98cf91 SHA-256: 5434ce895c8ead8d8a94cff7840acaa6a22e2b58c49be95acd587874e160d76e
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-themed and point to other PDF files, indicating a link farm for traffic generation or phishing. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/wix?keyword=hidden+figures+novel+study+guide
    • https://cdn.sqhk.co/zizaratijiga/hbihjht/lethargy_in_a_sentence_with_context_clues.pdf
    • https://static.s123-cdn-static.com/uploads/4369907/normal_60016bb03b745.pdf
    • https://cdn-cms.f-static.net/uploads/4379387/normal_5fd7a6593e15f.pdf
    • https://cdn.sqhk.co/demexadol/jgfeR8H/the_trails_apartment_homes_gainesville_fl.pdf
    • https://cdn-cms.f-static.net/uploads/4459624/normal_60213f3975e24.pdf
    • https://cdn-cms.f-static.net/uploads/4387571/normal_60369d8821c45.pdf
    • http://waliwosodumobu.iblogger.org/bleacher_report_ncaa_football_picks_week_8.pdf
    • https://cdn.sqhk.co/gukokefa/chdhfSG/helix_piano_tiles_music_ball_jumping.pdf
    • http://balewezekowesab.iblogger.org/vonopabizorobikovekajut.pdf
    • https://cdn.sqhk.co/mowasikuso/S313whj/vip_slots_club_free_casino.pdf
    • https://cdn.sqhk.co/sewuvavimebi/fia4hcc/action_hero_biju_actors_names.pdf
    • https://cdn.sqhk.co/jerowerar/wHgjig3/black_friday_2020_amazon_deals.pdf
    • https://static.s123-cdn-static.com/uploads/4486190/normal_5fcbd933edb89.pdf
    • http://serikanipesemo.iblogger.org/refimidu.pdf
    • https://static.s123-cdn-static.com/uploads/4485152/normal_5fe40bb3de875.pdf
    • https://cdn.sqhk.co/feketukadoz/gehjHVk/atv_dirt_bike_xtreme_racing_mod_apk.pdf
    • https://cdn-cms.f-static.net/uploads/4367004/normal_60397f550c570.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tunazafagid.epizy.com/transunion_credit_report_vs_equifax.pdf
    • http://mosuzuxogobet.epizy.com/zapidajiju.pdf
    • https://2e5cbe44-7de3-4e3f-b94c-8a8567814465.filesusr.com/ugd/f96b02_19b0b09937b5418993a2a855ad5c307f.pdf?index=true
    • https://0eaabcdb-938a-45a6-85a3-1a7d796bbcdd.filesusr.com/ugd/8d6d25_1770f4cc99704d909452f91cf7a51b71.pdf?index=true
    • https://00c0516a-c822-4344-a779-6f74e039753d.filesusr.com/ugd/9e41f0_f90503084d644749a272fdb7b200ebe2.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f828.bin
53887f92b69e373ed341f51f786ab5dfcc3f1af5a5ea5d794b637765d4efaadc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF828 4988 bytes
font_01_sfnt_off00010940.bin
4b5a63a75c33e9c5a7a2276808bdab9103afaf4ab892d84e684d45088c052498		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10940 11348 bytes

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