Malicious PDF — malware analysis report

Static analysis result for SHA-256 8839ef0bbd470b69…

MALICIOUS

PDF

77.9 KB Created: 2021-03-17 11:22:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 050d0836b9112fbd2f2672a92983af60 SHA-1: 5d96b1e5794081cba505ba719e72efdb595ae7ec SHA-256: 8839ef0bbd470b69db2afe4a1a2f6fa05015f9fa73b4e18b60c9f9d9189f4aa1
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 0.9992

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://resalured.ru/strik?utm_term=how+much+to+replace+timing+belt+honda+civic PDF link annotation
    • http://snapchat-alert.com/dokuzidikixavisenubow4zwbs.pdfIn PDF document text
    • http://tesar-krd.ru/carnival_cruise_app5797u.pdfIn PDF document text
    • http://beststudent.fun/nojexemusezaxonakefunibd3n.pdfIn PDF document text
    • http://redirunna.xyz/james_patterson_movies_streamingp0z9y.pdfIn PDF document text
    • http://lady-bug.club/18427847998h2opl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://putajamesar.rf.gd/list_of_antidotes_for_drug_overdose.pdfIn PDF document text
    • https://a84030a7-2e48-4039-807a-383e2b7216cc.filesusr.com/ugd/c5d40f_e2adc75aedd04177a6aa53777526d949.pdf?index=trueIn PDF document text
    • http://beninoduvewer.epizy.com/homeland_security_illegal_immigration_reporting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dae71fa-9a93-428c-89ce-a505092d6bc6/48818168019.pdfIn PDF document text
    • https://cf176ec6-4820-456b-adf9-61e5f06c968f.filesusr.com/ugd/43d598_0bb6472c93f445b58cad0d1bc586bb31.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zagubip/apex_legends_pc_epic_games.pdfIn PDF document text
    • http://lejaxofin.epizy.com/fenezurap.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/23500270228.pdfIn PDF document text
    • https://9cfe8934-cc69-4f76-a0d0-2e9849ea4530.filesusr.com/ugd/fd9558_1735d68e0b7d4f8aa5cb064e039f6bff.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/52895423310.pdfIn PDF document text
    • http://fizojigijuzad.epizy.com/hyrule_warriors_definitive_edition_lorule_map_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/collagen_improve_skin_tone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ae2ebf6-7a84-43a2-8590-ab3de039f101/how_long_does_it_take_to_get_paid_for_national_guard_drill.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85bdd6c7-4bd2-46c5-92de-8c7f02795628/vaxaminef.pdfIn PDF document text
    • http://tisuvelepep.rf.gd/wiwedefevatenepesorali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25534961-17c7-4dfb-ba59-a6061e1b1bdb/how_to_clean_milk_frother_on_espresso_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/cartogram_cracked_apk.pdfIn PDF document text
    • http://zirexig.epizy.com/lawabafojekowekinuwafol.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_off0000f2c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C3 5564 bytes
SHA-256: b76d83274785158f9137ce952f71e957273a51cf7b445a80bc415987c476a56c
font_01_sfnt_off00010591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10591 10496 bytes
SHA-256: 92b0eab2b336a6aa36ac9612d1545a99aca88b27db8bd0afef4a05ce544f3fa4

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