Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5a8ca7c9b6c8350…

MALICIOUS

PDF

79.1 KB Created: 2021-03-15 15:07:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e4ac0dd6e1de686e520d9de9e9a6a4d5 SHA-1: 546d175e5150840fd81ab77abffe883582257b82 SHA-256: c5a8ca7c9b6c8350bc5d2bea40950086450fa61adff5650f390b101fab61739a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9990

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://kuzutuzo.ru/wix?keyword=padi+rescue+diver+manual+pdf+french PDF link annotation
    • http://zoneeuro.pro/2960031881ktov.pdfIn PDF document text
    • http://lordtrans.ru/24732840048a4f9c.pdfIn PDF document text
    • http://allroadkamchatka.ru/991738536114nwaw.pdfIn PDF document text
    • http://porn77.design/calendar_2020_november_printableevohy.pdfIn PDF document text
    • http://totalcreditcheck.info/hp_elitebook_840_g2_i5_5th_generation_launch_date2stm0.pdfIn PDF document text
    • http://dream-stat.ru/jedipuvukuny3viy.pdfIn PDF document text
    • http://rubeatyshop.xyz/rurimesetokutukizekb9o6.pdfIn PDF document text
    • http://hdvideo.design/7919395885165kgv.pdfIn PDF document text
    • http://lilubaxubaxulu.sportsontheweb.net/58359597807.pdfIn PDF document text
    • http://roflan.site/zombie_shooting_game_for_pcw10ut.pdfIn PDF document text
    • http://mudixefibewab.mywebcommunity.org/how_to_replace_broken_door_glass.pdfIn PDF document text
    • http://chambrehq.xyz/zidakobudorovawac9w9y.pdfIn PDF document text
    • http://vadosixajobirug.mygamesonline.org/supidakejuwaxorakafab.pdfIn PDF document text
    • http://pixelbarista.com/kimuwigigivikananugagosudeoyga.pdfIn PDF document text
    • http://pubggaming.online/how_to_program_bmw_x3_garage_door_openerokvbk.pdfIn PDF document text
    • http://shopyou.online/morphological_monster_manualcj1wg.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/18ad6c1f-fa83-4016-b993-30a7d964d088/17023283323.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1833088-4079-4c44-9fa9-29c8f853cdc2/fall_of_reach.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f09ba1ef-2426-48b5-8d4e-c28f381a2c9b/wiluluku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35098f6f-6835-4f3c-a0b4-028e9edf63f2/loleperigar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3560698-bca7-4a64-9756-49ff6951a598/pmd_clean_pro_rose_quartz_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/gobekasajaxuped.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/mufavexoziwizovakevepifa.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/aleks_math_answers_college_algebra.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/barimufepelepafuziweba.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_off0000e706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE706 5456 bytes
SHA-256: 137a7c9e96acd85eb5c1473841cede474c23820115683b807dac68a430c0517b
font_01_sfnt_off0000f975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF975 22660 bytes
SHA-256: 6053cf4ee39b9028db768ae290f1d1831990f454a4fd79ac1fdc478d24b3dc61

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