Malicious PDF — malware analysis report

Static analysis result for SHA-256 15b8e3c4c4d15dd3…

MALICIOUS

PDF

76.5 KB Created: 2021-04-20 11:54:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0a35e28ca7786ef6fee3782fc43f4161 SHA-1: 9462ebdfb8271955f60fed8c3d14f646b7d2bd41 SHA-256: 15b8e3c4c4d15dd38e515f72fcb4ac0c1dc0fec819413cb761e387867b279485
126 Risk Score

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 0.9991

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://pelibifir.ru/strik?utm_term=identify+pressure+area+risk+assessment+tools PDF link annotation
    • http://lobabinuladeri.medianewsonline.com/arapa_trke_kitap.pdfIn PDF document text
    • http://goossyy.online/film_korea_frozen_flower_sub_indol6fzc.pdfIn PDF document text
    • http://liolika-rsya.ru/wubamarijeximegopogam7zh.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvajuvewuj/eXihgeF/telewanumonaxiter.pdfIn PDF document text
    • https://cdn.sqhk.co/guzoladip/cZQifif/vabigujow.pdfIn PDF document text
    • http://fepaporipevari.mypressonline.com/lakekuteluf.pdfIn PDF document text
    • https://cdn.sqhk.co/kisasizaro/dgegfEY/juruxuvovadokilekerepoxaw.pdfIn PDF document text
    • http://budofibo.mygamesonline.org/lojuxot.pdfIn PDF document text
    • https://cdn.sqhk.co/vemudumuxixu/3iCHG5V/nearest_metro_to_niit_sector_14_gurgaon.pdfIn PDF document text
    • http://carluxepaint.site/sizopilizujixoxajtm2p.pdfIn PDF document text
    • http://physcoo.com/does_home_depot_carry_greenworksib2ce.pdfIn PDF document text
    • http://domsale.xyz/cheat_sheet_statistics_rooawn.pdfIn PDF document text
    • http://bumufirila.mygamesonline.org/zokilelotatejozafuvotab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kigokigaruv.myartsonline.com/archival_research.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/196b3fad-901e-4224-b76e-6d20de3800de/how_to_measure_weight_loss_progress.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24cfcf71-471a-4abf-8e23-3aa7258ab3a0/is_having_3_w_on_your_transcript_bad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad587b29-c5d1-4d9b-a4f3-8aa82b843649/2005_honda_rancher_350_carburetor_rebuild.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/what_are_the_best_car_alarms.pdfIn PDF document text
    • http://sarutufasiko.atwebpages.com/falukikeditipotevugidabaj.pdfIn PDF document text
    • https://s3.amazonaws.com/popisiburewixuj/apache_openoffice_for_windows_xp_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d44f938-606b-454e-9205-04ce75153f72/what_are_the_different_styles_of_country_music.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/32233302071.pdfIn PDF document text
    • http://vawinujofupin.myartsonline.com/77964692652.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0f9b3e2-4ac2-4d94-baa1-6b938da4db9d/17467256857.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_off0000ec3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3A 5292 bytes
SHA-256: ed2c1abf215a8f36b77877cbcb699f970135806aff3e29a8ed88993826442c63
font_01_sfnt_off0000fe38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE38 11176 bytes
SHA-256: c4793da0b4817f2d011a76605906c8ab488eefe74c18932d6d268323acf0f2c6