Malicious PDF — malware analysis report

Static analysis result for SHA-256 c07c23382ba906c0…

MALICIOUS

PDF

71.9 KB Created: 2021-03-11 03:46:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e1f964359d544480fd4f21ca69de1ab7 SHA-1: 5e67c3fc98200218e0c84a42ff2f7d009315348e SHA-256: c07c23382ba906c081642ac8495476bec75cedbb7e0678d3f1ab865e7a6e4213
186 Risk Score

Malware Insights

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

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 0.9956

Heuristics 6

  • 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 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.
  • 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://lozipotod.ru/award?keyword=amreli+express+news+paper+pdf PDF link annotation
    • http://bravos-kids.ru/how_to_write_a_screenplay_and_sell_itd5jo8.pdfIn PDF document text
    • http://goodsfor.life/how_much_a_foster_parent_get_paid_in_florida963p1.pdfIn PDF document text
    • https://bitigufej.weebly.com/uploads/1/3/5/3/135337089/tirafer.pdfIn PDF document text
    • http://shop-kid-toys.online/sixonolepaxemujvr4l.pdfIn PDF document text
    • https://cdn.sqhk.co/simixejazir/YhgTvig/bexley_ear_wax_clinic_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/wexovezojab/ghijYgg/3d_surround_music_player_apk_free_download.pdfIn PDF document text
    • http://raisinshub.club/how_to_build_a_timeless_homeh2jxb.pdfIn PDF document text
    • https://cdn.sqhk.co/peferitukofa/Bcgd6if/starcraft_hd_permanent_adhesive_vinyl_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/xozifejor/dhc7Eq7/camera_and_microphone_for_computer_staples.pdfIn PDF document text
    • https://cdn.sqhk.co/wifopuzuxiba/bEXihBf/gemebexuliluwubenalu.pdfIn PDF document text
    • https://zalinojawovuga.weebly.com/uploads/1/3/4/8/134886974/3818978.pdfIn PDF document text
    • https://xoxovumalojiru.weebly.com/uploads/1/3/0/8/130874224/6627688.pdfIn PDF document text
    • http://taher-tcac.com/indofood_agri_annual_report_2017xwm7a.pdfIn PDF document text
    • http://draiwenstore.online/star_trek_into_darkness_soundtrackodqeo.pdfIn PDF document text
    • http://sodahq.pro/data_science_jobs_nycizizf.pdfIn PDF document text
    • http://geesecam.com/sabuxudinoxefux4f8w.pdfIn PDF document text
    • https://cdn.sqhk.co/dokukavifig/jcigEgg/disable_digital_wellbeing_android_11.pdfIn PDF document text
    • https://zutizogemene.weebly.com/uploads/1/3/5/3/135348028/lakuwubuzisejow.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/iMUjbjg/gusamitasajevub.pdfIn PDF document text
    • http://8gusevshop.space/bollywood_movie_ashoka_full_hdyw97a.pdfIn PDF document text
    • https://cdn.sqhk.co/xumupojamax/Kyicagh/83508194267.pdfIn PDF document text
    • https://jefanumu.weebly.com/uploads/1/3/4/8/134889008/190c50c2b1ebe.pdfIn PDF document text
    • https://katalulipof.weebly.com/uploads/1/3/2/7/132710678/4236238.pdfIn PDF document text
    • https://cdn.sqhk.co/dasisogi/1yiiOjg/8911534244.pdfIn PDF document text
    • https://cdn.sqhk.co/kezixowog/ihijvjg/hidden_journey_adventure_puzzle_quest.pdfIn PDF document text
    • http://meetsoda.pro/technicolor_dwa0120_reset5oils.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_off0000dd8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD8E 5336 bytes
SHA-256: 54a97ef157cc12d57f73f209d9b55384fe757933388343861ea4278f9c309a06
font_01_sfnt_off0000efb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB1 9972 bytes
SHA-256: 7a80463b96a3d1553fffe8ae2ee5bdc7338f2f5124df28387ad573608d91afde