Malicious PDF — malware analysis report

Static analysis result for SHA-256 302578f55898b04d…

MALICIOUS

PDF

83.1 KB Created: 2021-04-17 19:05:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7073b38f95de1a82a335baa3112b074c SHA-1: 541070e879d75b24fa0758fbd3c73f58c24976e9 SHA-256: 302578f55898b04d2b371b1ff98a3db687f29e79822b190d119b05aaea79ec3a
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 0.9996

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://jacksth.ru/strik?utm_term=how+to+change+fuel+lines+on+poulan+wild+thing+chainsaw PDF link annotation
    • https://cdn.sqhk.co/zinazejoras/iRpjiib/sound_physicians_emergency_med_of_greater_memphis_billing.pdfIn PDF document text
    • https://cdn.sqhk.co/nurijodefa/hbhchiV/2368589884.pdfIn PDF document text
    • https://lomewulepizava.weebly.com/uploads/1/3/3/9/133999744/1867172.pdfIn PDF document text
    • https://vinosubolab.weebly.com/uploads/1/3/5/3/135316207/limopixisedebuju.pdfIn PDF document text
    • https://moduruwili.weebly.com/uploads/1/3/2/7/132710657/jokotuxit-niwusamidofa-suzijolozosaviv-mikupus.pdfIn PDF document text
    • https://togurugake.weebly.com/uploads/1/3/1/4/131412858/6f8c13db67c938.pdfIn PDF document text
    • http://pasetbs.xyz/why_do_they_call_it_a_speakeasy1mr2z.pdfIn PDF document text
    • http://netewe5.xyz/389779209284a2rb.pdfIn PDF document text
    • https://tarosukawumoteb.weebly.com/uploads/1/3/4/6/134691059/4396897.pdfIn PDF document text
    • https://pusiruse.weebly.com/uploads/1/3/4/7/134717846/davirifex_kapesefekifob.pdfIn PDF document text
    • http://top-salez.site/blackpink_song_forever_young663wu.pdfIn PDF document text
    • https://vasikeja.weebly.com/uploads/1/3/2/7/132710563/jumoluferon.pdfIn PDF document text
    • https://cdn.sqhk.co/fijufupuga/R9giWXc/piggy_boom_game_play_online.pdfIn PDF document text
    • https://cdn.sqhk.co/xaduwudixum/heighhI/bitajigobipa.pdfIn PDF document text
    • http://banquepopulaire-fr.org/into_the_wild_jon_krakauer_audiobookq0vwl.pdfIn PDF document text
    • https://sazunanu.weebly.com/uploads/1/3/4/5/134596286/poxuwufebarupen_xaborej_tusixuvabo_rafuwi.pdfIn PDF document text
    • http://openlait.pro/what_is_another_word_for_study_against_the_law2smi4.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/a3f2fe21-03c6-4462-8259-03fcaf461696/how_to_fold_up_a_bowflex_power_pro.pdfIn PDF document text
    • http://wibiralor.rf.gd/autumn_leaves_tenor_sax_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4ca7f4f-feb7-4d65-ada5-10def20c46c1/zifowekesizi.pdfIn PDF document text
    • http://zutilokip.epizy.com/makkar_ielts_speaking_2020_may_to_september.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDA 5376 bytes
SHA-256: 60357e6bd63666133d92fea6a88ce66b1aa76f986447afa2ed734e43b659a14d
font_01_sfnt_off00010f36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F36 1936 bytes
SHA-256: 21a7146106e2ad29a4dcc6aa55cee169416400570e2b3d493b6d071cb256f2f3
font_02_sfnt_off00011878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11878 10932 bytes
SHA-256: c21b4df16f1ea417f9b77026f0feef5864dbdfb6973a6f34210b3e0a77525305