Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb67649d50aee5d4…

MALICIOUS

PDF

71.8 KB Created: 2021-03-19 14:47:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: f8478a8b46b5b58ca62bcd6c36b47da7 SHA-1: 4435668f6e5321241bc8dadc970cb533c2ef5e86 SHA-256: fb67649d50aee5d495461165707276145a720895389ee649dcd0d06c8528c2dc
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a website disguised as review material, likely to trick them into visiting a malicious domain. The PDF's structure and embedded content suggest it's part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/award?keyword=licensure+examination+for+agriculturist+reviewer+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4427514/normal_60369ac7ccf22.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/Mtvjjjg/willow_watch_live_cricket.pdfIn PDF document text
    • https://lofefogurabu.weebly.com/uploads/1/3/1/1/131164054/3009968.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470533/normal_60523908701b9.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwasokeg/fsifGSa/99502887345.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496005/normal_600a983c2fb85.pdfIn PDF document text
    • https://xegoratan.weebly.com/uploads/1/3/2/7/132712572/fozefu_mulubudubotat_jumodigukarelib.pdfIn PDF document text
    • http://jibiduseg.22web.org/salesmanship_merit_badge.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gavapozalilup/entity_framework_tutorial_for_beginners_in_asp.net_c.pdfIn PDF document text
    • http://fonimegalidoxu.epizy.com/vobederodofoposesije.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94dc81d5-25db-4494-93d4-1f70d1909a83/subemabebagedasutitaziw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/117a9c0a-4322-4b54-9e52-1c353ed37a12/bubif.pdfIn PDF document text
    • http://dejoxatumiki.rf.gd/how_to_analysis_data_in_r.pdfIn PDF document text
    • http://takikixak.rf.gd/66424111319.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7defe194-2558-4f95-8b3d-ffe56545c493/84497963828.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/68149559187.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b360e47-ac76-4594-ad61-f0908a6f4c63/xagaripofotexiw.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/naderazasezulijuvowuzuk.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9EC 5520 bytes
SHA-256: 9c557c2dd6a55ad5f9f6f8a8ebd240fb6ca00c750cd7c388037e7185c830bb6d
font_01_sfnt_off0000dcac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCAC 10968 bytes
SHA-256: 37fc8a3cca3a200b48d666e0971613186acab42fbb883823b6a040eccfa71a62
font_02_sfnt_off00010147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10147 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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