Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aa6a20bbd590525…

MALICIOUS

PDF

91.9 KB Created: 2021-04-19 10:41:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3d886b8e2b5451f454fe58acff3c3791 SHA-1: da6c5fd31edcf8e6d7824a4fa349b279dceaf6ff SHA-256: 1aa6a20bbd59052569477c3fc9791a6a31100a06332355c2f381ba7768b21646
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 0.9995

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://midufefew.ru/strik?utm_term=subway+surf+apk+hile+indir+2019+ios PDF link annotation
    • https://cdn.sqhk.co/fuvebopeweb/Qjfwkhd/popular_tech_news_site_crossword_puzzle_clue.pdfIn PDF document text
    • http://redita.fun/13233346491i8rx6.pdfIn PDF document text
    • http://homebig.space/mebudexenaguzoneruza1o0ja.pdfIn PDF document text
    • http://weareanonymous.org/checklist_for_witcher_3_wild_hunt_gameplay9cdah.pdfIn PDF document text
    • https://cdn.sqhk.co/mogudekusab/ghgdifM/80s_female_country_songs_list.pdfIn PDF document text
    • http://1xbets-reg.site/how_to_program_tork_rz307_timer858cb.pdfIn PDF document text
    • http://instapriz.site/el_sistema_politico_mexicano_daniel_cosio_villegas_gratisdminy.pdfIn PDF document text
    • https://cdn.sqhk.co/xovepejegosi/ijAihiY/vizigawotezogudo.pdfIn PDF document text
    • https://cdn.sqhk.co/mixubiki/jjehg2l/zombie_royale_warzone.pdfIn PDF document text
    • https://cdn.sqhk.co/zovifesojeme/gGheJjb/smash_repairs_kingston_tas.pdfIn PDF document text
    • http://noxugimeto.iblogger.org/trastornos_animicos.pdfIn PDF document text
    • http://xojopimo.22web.org/77051424221.pdfIn PDF document text
    • http://titanof-filtr.ru/what_is_the_most_popular_kitchenaid_mixer_colorkgf15.pdfIn PDF document text
    • http://topplafond.xyz/robazojmhu2u.pdfIn PDF document text
    • http://muliruno.22web.org/11003802077.pdfIn PDF document text
    • https://cdn.sqhk.co/pajazidif/5VgejjA/56603468971.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/bcda5447-56c0-4af4-80b5-920f8126ea53/dd_3.5_monster_search.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6087de2b-d517-4969-af4c-d405320eb1fd/mebumomekifolozezufoli.pdfIn PDF document text
    • http://vajezozaxapom.rf.gd/fuderuzitijogi.pdfIn PDF document text
    • http://sobibuxasegisun.rf.gd/gta_3_mobile_cheats_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57cccef2-eb58-4d94-b5f7-900525f15cf3/18370186942.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/021e4759-0e00-4e08-80c0-50e19f2623bc/how_to_use_onenote_effectively.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0001394f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1394F 21980 bytes
SHA-256: c3930a8b720d7e530f800fc28cf1e1589a92e8cb09b93c1cdb755ec80146bc17
font_00_sfnt_off0000fc99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC99 6112 bytes
SHA-256: 4e39fd9f287526699b9b2c1250f47c14e0fbe4e7f0e33fc15a0065279555465c
font_01_sfnt_off00011175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11175 12976 bytes
SHA-256: 45a0cca9dd76f7f21e0b7c931f7397aed02fd3cc0b6bb284dc0a103c6c7b453a

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