Malicious PDF — malware analysis report

Static analysis result for SHA-256 046f5916663aba75…

MALICIOUS

PDF

75.7 KB Created: 2021-03-17 00:58:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: c045b2e8ed452208ccbc58406f267657 SHA-1: b34a260796fb1f9c6927f7de41a7affbcc9b0de9 SHA-256: 046f5916663aba75500a5b9c70398e05c97e90b6bac9077f76e75f85cbe0455d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically points to the document acting as a link farm on disposable hosting, with numerous distinct hosts and UTM parameters suggesting tracking or redirection. The embedded URLs further support this, directing users to potentially malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/strik?utm_term=msrm+repeater+reset PDF link annotation
    • https://zamosokajuzosa.weebly.com/uploads/1/3/4/6/134651904/xudepomuki.pdfIn PDF document text
    • http://drenajkrasnodar.ru/what_extra_books_does_the_catholic_bible_haveq31y4.pdfIn PDF document text
    • http://vereffka.xyz/750549429633w2zd.pdfIn PDF document text
    • http://wunupewoxe.iblogger.org/45950676268.pdfIn PDF document text
    • https://cdn.sqhk.co/nojedajoze/j2MNjgp/game_of_sultans_consorts.pdfIn PDF document text
    • https://cdn.sqhk.co/momogajopi/ic9iXgj/97098122802.pdfIn PDF document text
    • http://gmetry.online/the_pedestrian_ray_bradbury_symbolism96g1g.pdfIn PDF document text
    • http://jivopifavu.22web.org/nurokuxexedukabebawokis.pdfIn PDF document text
    • http://lavorunolutoga.22web.org/koribiboragudin.pdfIn PDF document text
    • http://itdiscount.info/wupuxawovitovea7pwu.pdfIn PDF document text
    • https://jabuvevakeg.weebly.com/uploads/1/3/4/6/134685488/a4fe901780fb32.pdfIn PDF document text
    • https://cdn.sqhk.co/zefafulolit/GOhhbs1/bovakefigiwowa.pdfIn PDF document text
    • http://prequester.online/gifexusixake3lgwj.pdfIn PDF document text
    • https://cdn.sqhk.co/kimefutif/rhbiggg/hobby_lobby_store_hours_saturday.pdfIn PDF document text
    • https://cdn.sqhk.co/vanewano/ieNDugc/27900714167.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/e9366fb4-560c-4505-9715-96af21300d2a/how_to_clean_a_slush_puppie_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/176756f0-9f99-4887-8e43-c33e643a357f/what_books_to_read_before_getting_married.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b80c5a4-2ef0-4522-9049-f55dd0e79fa0/belosajo.pdfIn PDF document text
    • http://sowinoto.epizy.com/natural_toxicants_in_food.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfbaac96-34c2-4d99-b219-7b8dc2902796/65438527996.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_off0000eb97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB97 4936 bytes
SHA-256: f52f8e2a97b6c9489e57e50aaa315bd18b57d15b89951ce539a36d9dcfc3640d
font_01_sfnt_off0000fc4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC4C 10612 bytes
SHA-256: be532106ef0caf1acc843a3a19734c070af8978bcef676f7cbdee6bb4a62efde

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