Malicious PDF — malware analysis report

Static analysis result for SHA-256 b98fa4e4ba0e7d02…

MALICIOUS

PDF

74.9 KB Created: 2021-03-20 21:05:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 25dd644c49577d31ff6efa658ed4f03b SHA-1: 23fd05a41ccf62e31cc56cb8618b57eee7951a10 SHA-256: b98fa4e4ba0e7d021be39fc436d83a626cd07ed0a36757964b8c21d49580d520
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded links, with at least one pointing to a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to movie downloads, suggesting a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=tamilgun+bahubali+2+hd In PDF document text
    • http://itawegan.space/tewalogibugezosokelevd35w.pdfIn PDF document text
    • http://tafiwon.mywebcommunity.org/80982878638.pdfIn PDF document text
    • https://cdn.sqhk.co/fowipovoji/ihb1DVl/transfer_news_barcelona.pdfIn PDF document text
    • http://bajifepeselok.sportsontheweb.net/interior_design_colleges_in_toronto_canada.pdfIn PDF document text
    • http://zitugaxusi.mygamesonline.org/yamaha_rx-a1040_review.pdfIn PDF document text
    • http://vurovolapoza.mygamesonline.org/xosowazoxisopilojuvile.pdfIn PDF document text
    • http://vashe-zdorovie.xyz/tie_dye_wallpapers_for_iphonesptta.pdfIn PDF document text
    • http://triple-doska3.club/40408645248ufvpa.pdfIn PDF document text
    • http://sumapewub.getenjoyment.net/abecedario_arabe.pdfIn PDF document text
    • https://cdn.sqhk.co/perikowep/he1jdgf/stiletto_nails_designs_pinterest.pdfIn PDF document text
    • http://repaircreditscore.info/legutinesizepuvodarasojnh8b.pdfIn PDF document text
    • http://koxelovanalimu.getenjoyment.net/l_anatomie_de_la_femme.pdfIn PDF document text
    • http://i-men.ru/betty_crocker_baking_basics_book8fbp4.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/09592e2b-86e7-4436-88c2-41b5443963ee/rizowadalaje.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/50932296975.pdfIn PDF document text
    • http://jutagejefutix.atwebpages.com/71433424764.pdfIn PDF document text
    • http://xujided.onlinewebshop.net/86340255121.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/chale_aana_song_mp4_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/simarelemepowuveduxij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b833cc04-f243-4186-864c-cadc098fba27/pojasatiru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dc3e308-d138-49e3-a5fd-3dfd0f2a0e82/how_to_cure_golfers_elbow_quickly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/190c439b-38a7-4319-96ca-9c6fa1bfcee5/45511619040.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42fdd074-4bfd-4f7e-ae98-f99f9e8cd901/bojidafevuviropuwiroxe.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_off0000e6c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C0 5188 bytes
SHA-256: c5ee82ba07c446b2413c8cb735c15bfd839ad71d2ffcb748af8484ee37f61c19
font_01_sfnt_off0000f841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF841 11200 bytes
SHA-256: b5e10b371bb493f2674436b6aedbc154a17f5a4009e728f951f6422076555e2b

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