Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ec812caf335b97f…

MALICIOUS

PDF

80.2 KB Created: 2021-03-12 13:24:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 00076a5bd8d17db4a1ede6e6104c1f3b SHA-1: 1127a2c23f729759d1453d70de4e0e5b09b20e42 SHA-256: 2ec812caf335b97f75276980c550fcbda9dea537dabfe17ebe12be8b883550c5
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document exhibits characteristics of a phishing or malware distribution lure, as indicated by the 'Browser extension / update installation lure' heuristic and the presence of numerous external links to disposable domains. The ML classifier and ClamAV detection further support its malicious nature. The document likely attempts to trick the user into downloading and executing a malicious payload by masquerading as a necessary update or content viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://pelibifir.ru/123?utm_term=chrome+free++for+windows+10+english PDF link annotation
    • https://zadobezaja.weebly.com/uploads/1/3/0/7/130775221/gidibanafeki.pdfIn PDF document text
    • http://jivavesomuviz.getenjoyment.net/apple_tv_3_jailbreak_benefits.pdfIn PDF document text
    • https://mipabewezodif.weebly.com/uploads/1/3/5/3/135315693/7984a301e.pdfIn PDF document text
    • http://kalowodopole.mygamesonline.org/aqua_data_studio_tutorial.pdfIn PDF document text
    • https://dexekuweda.weebly.com/uploads/1/3/4/7/134705305/fumevigoz_kejizirim_woxuved_rulokewukize.pdfIn PDF document text
    • https://xezatitewifesel.weebly.com/uploads/1/3/4/3/134393938/f21f0.pdfIn PDF document text
    • https://busozovamifolak.weebly.com/uploads/1/3/4/2/134235369/c94c1ab15cb758.pdfIn PDF document text
    • https://kufojomarolov.weebly.com/uploads/1/3/4/4/134401526/pifeburuve.pdfIn PDF document text
    • https://talebizipuvi.weebly.com/uploads/1/3/1/4/131483067/tewuxukewijimetuvim.pdfIn PDF document text
    • http://lotibamuzuti.scienceontheweb.net/define_debit_card.pdfIn PDF document text
    • http://tosefabebiribow.scienceontheweb.net/rijowonapumanolix.pdfIn PDF document text
    • https://lakomefolowe.weebly.com/uploads/1/3/0/7/130776578/widik.pdfIn PDF document text
    • http://moxegelubopidi.sportsontheweb.net/piano_adventures_primer_performance.pdfIn PDF document text
    • http://gejejasofubi.mywebcommunity.org/60836521718.pdfIn PDF document text
    • https://bamupenasod.weebly.com/uploads/1/3/1/4/131410012/1184541.pdfIn PDF document text
    • https://dawejiji.weebly.com/uploads/1/3/4/5/134505451/tonejumo_vozizet.pdfIn PDF document text
    • http://moxegelubopidi.sportsontheweb.net/the_couple_next_door_barnes_and_noble.pdfIn PDF document text
    • http://ladebizelase.scienceontheweb.net/5288747969.pdfIn PDF document text
    • https://zagusopiv.weebly.com/uploads/1/3/4/2/134234894/ff4c40.pdfIn PDF document text
    • https://rofujerejikuf.weebly.com/uploads/1/3/5/3/135388349/fijixaz-wubuj-roworusam.pdfIn PDF document text
    • https://xumizobizuzu.weebly.com/uploads/1/3/4/6/134688834/fifoli.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000feda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDA 5304 bytes
SHA-256: 79023bc6e77147aa0ae71acd1a97aba1db649486d925b40d700aa24f5c1779c5
font_01_sfnt_off000110d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D6 10212 bytes
SHA-256: e562f2e7cbc13f8775979bcf648ed481b1adbbdca7e50ce6ab90567cb833fd39

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