Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ea2e5ae7ce7926d…

MALICIOUS

PDF

73.6 KB Created: 2021-03-30 09:52:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 407864edc5ae69ad500fdcd1b183e90a SHA-1: 9aff58d582b3bb6320dc6bb80cdbad2e4df1c410 SHA-256: 7ea2e5ae7ce7926d379a3194b1d2c88339ac2a899339a61d07056a3a70b0d5e9
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9997

Heuristics 6

  • 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.
  • 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://soxebez.ru/award?keyword=project+management+business+case+pdf PDF link annotation
    • https://cdn.sqhk.co/temazajilib/ajibWCc/46144869608.pdfIn PDF document text
    • http://puwinowelin.medianewsonline.com/jafopubifuwuzapixawi.pdfIn PDF document text
    • https://cdn.sqhk.co/vujenibolo/agdidge/bewapareb.pdfIn PDF document text
    • https://cdn.sqhk.co/valujoper/jfwiejf/baby_care_play_mat_moroccan_beige.pdfIn PDF document text
    • https://cdn.sqhk.co/puvegipuros/gjJiiia/baby_shark_io_unblocked.pdfIn PDF document text
    • http://lotusedafefuwi.22web.org/jilizef.pdfIn PDF document text
    • http://vikorurapufor.iblogger.org/medicare_levy_exemption_form_2020.pdfIn PDF document text
    • http://rebibedo.mywebcommunity.org/voltage_regulation_of_single_phase_transformer.pdfIn PDF document text
    • http://jajolamuseku.medianewsonline.com/dobasixe.pdfIn PDF document text
    • http://juvovagesubo.mywebcommunity.org/nowapobomev.pdfIn PDF document text
    • https://kadekorik.weebly.com/uploads/1/3/1/4/131453454/dodupabifu.pdfIn PDF document text
    • https://cdn.sqhk.co/xunijejozi/ghc1Vhf/1390111283.pdfIn PDF document text
    • https://cdn.sqhk.co/sirojenu/Tjhjijj/degotiba.pdfIn PDF document text
    • https://wavinibavuma.weebly.com/uploads/1/3/1/3/131398010/fugexof-tujofave-xopupolozafup-mexomafimi.pdfIn PDF document text
    • http://xulodol.mygamesonline.org/muwekemonaxexofubumawik.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sufiwidixoga.epizy.com/wikifexaduva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15301bd8-382f-4ec4-984d-a14500711fab/how_to_use_tracktion_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a4a6853-0fc9-477d-9423-b8d6fa4d24a6/monster_inc_mike_wazowski_voice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d3467ea-59be-4a82-87f9-0b7adec70986/ba_ii_plus_professional_battery_replacement.pdfIn PDF document text
    • http://bisubop.epizy.com/el_cerebro_libro.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_off0000e20b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE20B 5660 bytes
SHA-256: 09c48f75a543f836bddebe5fc602709cdaaf0cb74b49b8dc9336240cbfdb6e5a
font_01_sfnt_off0000f533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF533 10572 bytes
SHA-256: b7dedf62222f2fa67ce24c899f90105fa2cba735e0aabef869c449ad9f264390

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