Malicious PDF — malware analysis report

Static analysis result for SHA-256 75d53ee3fe7e7fa5…

MALICIOUS

PDF

88.3 KB Created: 2021-04-14 12:30:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c1ef111ecf28a599e9450e3adc26e093 SHA-1: 1437e0120b20826907b85b85e7d2974c5a921c04 SHA-256: 75d53ee3fe7e7fa56c8a3eb65518d6877d083de1f2e7fc6789b8e8a151c5c123
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 0.9997

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://baarspo.ru/strik?utm_term=why+did+the+radical+republican+reconstruction+plan+fail PDF link annotation
    • http://digtalcaliper09.xyz/apple_tv_3rd_generation_apps_australiaaf1er.pdfIn PDF document text
    • http://welitizenowem.mywebcommunity.org/jovimomo.pdfIn PDF document text
    • http://gladkoe-telo.xyz/michael_jordan_the_life80low.pdfIn PDF document text
    • http://help-copyrightviolationhelpcenter.com/556196384704wmjk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385633/normal_5fcc6b49c5567.pdfIn PDF document text
    • http://vomimaforotagi.mywebcommunity.org/92227491245.pdfIn PDF document text
    • http://rofibopuxi.iblogger.org/77421998801.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489042/normal_6059e572e8210.pdfIn PDF document text
    • http://toxipoxekej.medianewsonline.com/14625999526.pdfIn PDF document text
    • http://natnat.fun/tokapopezawlh576.pdfIn PDF document text
    • http://kajuzumanaz.sportsontheweb.net/73901274665.pdfIn PDF document text
    • http://carbags.site/autosys_reference_guide_for_unixxtjws.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fofuxolisemaxim.epizy.com/badan_beruniform_malaysia.pdfIn PDF document text
    • http://majikujiva.epizy.com/62300995045.pdfIn PDF document text
    • http://xenilesaripesu.epizy.com/dafagizapukebuwerukidube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6fa4128-7685-45c2-a26a-f4e66db8cb6d/how_do_you_record_music_at_home.pdfIn PDF document text
    • http://liwivudelaje.epizy.com/tipos_de_sistemas_econmicos_existentes.pdfIn PDF document text
    • https://7a1f2a0d-094a-4466-88af-72a4af93b9fa.filesusr.com/ugd/22739b_1fe366cb089c4722a8fda6cf4a96b20c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b45480bd-cf18-412d-9a94-56038beb7742/typography_logo_design_dribbble.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1b3e764-f584-4121-9a52-da71d9181a47/what_does_rotational_kinetic_energy_depends_on.pdfIn PDF document text
    • https://f72e0e13-a873-49c5-9cb5-3c2848b8c5b2.filesusr.com/ugd/f8ba4b_a614c8a671a14d1191eab0107ee42581.pdf?index=trueIn 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_off00011cdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CDD 5496 bytes
SHA-256: 4c9984c2d12aa22ff32cead7d3462430a569436866ae828e44c8e041a7236659
font_01_sfnt_off00012f97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F97 10752 bytes
SHA-256: f4d257c9d161c189d41316e77a13ca3351de8d8e709b63185636a36e17fa0c00

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