Malicious PDF — malware analysis report

Static analysis result for SHA-256 7532051798c93726…

MALICIOUS

PDF

88.5 KB Created: 2021-04-29 03:16:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ffd20eaa26ae0bbc72e68365ef81fc12 SHA-1: 5da837196f1c64e35f607b30dffdf15e57db2bef SHA-256: 7532051798c937261c41f8dc5cfbf4395d643933748697cf1d22c7c871cdc1c1
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 0.9985

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://mezovuduw.ru/strik?utm_term=are+landlords+required+to+clean+carpets+in+california PDF link annotation
    • http://setlyb.online/unlimited_memoryykqqy.pdfIn PDF document text
    • http://7lessons.fun/wuzamoje30g6s.pdfIn PDF document text
    • https://cdn.sqhk.co/mezawuso/FIjehjr/the_checklist_manifesto_chapter_2_summary.pdfIn PDF document text
    • http://metaleagle.ru/evenflo_tribute_lx_convertible_car_seat_jupiter3zcwh.pdfIn PDF document text
    • https://zubikuzo.weebly.com/uploads/1/3/1/4/131453486/nowiguvof.pdfIn PDF document text
    • https://loxogekero.weebly.com/uploads/1/3/4/0/134040689/69976.pdfIn PDF document text
    • http://widarexidifazi.iblogger.org/14411401849.pdfIn PDF document text
    • https://cdn.sqhk.co/sujubowip/cCubOhe/pudoliwopimumapirokane.pdfIn PDF document text
    • https://kovorugoza.weebly.com/uploads/1/3/1/3/131383314/mipibadasavuno_juruxewarofazu_vigubu.pdfIn PDF document text
    • http://xokodiraki.22web.org/biztalk_server_tutorial.pdfIn PDF document text
    • http://raisinshub.pro/back_pain_physiotherapy_exercisesd847f.pdfIn PDF document text
    • https://cdn.sqhk.co/fopikudapom/miePsDf/the_shadow_sun.pdfIn PDF document text
    • https://cdn.sqhk.co/dudokirabog/PhhTNoW/audio_song_free_tamil.pdfIn PDF document text
    • http://gulexamotapa.iblogger.org/kijokeluginisuzuliwox.pdfIn PDF document text
    • https://cdn.sqhk.co/nazujovo/wxa12ij/wild_blood_offline_apk_free_download.pdfIn PDF document text
    • https://wutiboduselojo.weebly.com/uploads/1/3/4/6/134665342/foxunaboxizuniruzana.pdfIn PDF document text
    • https://lefiligirer.weebly.com/uploads/1/3/4/7/134709268/4eed7bffe500f.pdfIn PDF document text
    • http://befakupamexi.iblogger.org/eyelash_extensions_certification_training_ct.pdfIn PDF document text
    • http://gopekulodu.22web.org/how_to_say_oh_ok_in_french.pdfIn PDF document text
    • http://gta-msk.ru/xetosakaxukakakowumiye8ld.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://selofedibaxonal.epizy.com/1388914307.pdfIn PDF document text
    • http://durunorutap.epizy.com/2018_cadillac_ats_sedan_owners_manual.pdfIn PDF document text
    • http://fesebeta.rf.gd/the_righteous_mind_summary.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C0 5148 bytes
SHA-256: a35d398ae02fbac2d8a33d636ff49671561afcf02c0963f4488782d77652b7cd
font_01_sfnt_off00010a47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A47 10724 bytes
SHA-256: 8af8b54c68456b2754e0283216642bbff0a8435f10d4a33dbf3ceca1676aee97
font_02_sfnt_off00012f28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F28 16060 bytes
SHA-256: 4ef9506ee11a349461550e6b437e3786686b598308a87786035880d16624999d
font_03_sfnt_off000143c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143C0 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3