Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff34b335645ac578…

MALICIOUS

PDF

85.6 KB Created: 2021-03-07 22:36:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c4cb2efb18c75120e565b15315859119 SHA-1: 3a231b49994dbf498ba7265a77112dd95fecdda6 SHA-256: ff34b335645ac578aa739dc2b646007e19dbd50dc23e46949257f53ff2525a90
156 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 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 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.
  • 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://mezovuduw.ru/wix?keyword=tomb+of+miktrull+chest+bug PDF link annotation
    • https://cdn.sqhk.co/serodozire/qdQchcE/37306528325.pdfIn PDF document text
    • https://sosanibizug.weebly.com/uploads/1/3/2/6/132695556/7864200.pdfIn PDF document text
    • https://cdn.sqhk.co/kigaratak/hfjagdq/wimazuvevofoxama.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378425/normal_5fda154e0502f.pdfIn PDF document text
    • https://cdn.sqhk.co/jarixizotib/SOk4hhw/six_flags_safari_reviews_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483864/normal_60348adb1ad8a.pdfIn PDF document text
    • https://cdn.sqhk.co/nukusigemug/zjeibto/35755575228.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475720/normal_602c2abad27fe.pdfIn PDF document text
    • https://cdn.sqhk.co/votojuxosaf/jdhbha6/best_r_b_hits_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/zapajugadira/jgflzbn/vunibe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450507/normal_602775136a926.pdfIn PDF document text
    • https://zusabave.weebly.com/uploads/1/3/1/4/131406295/4b70d1046c870.pdfIn PDF document text
    • https://cdn.sqhk.co/nivunufozub/ijbtjhX/bunny_pop_game_download_for_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481424/normal_603033b776244.pdfIn PDF document text
    • https://cdn.sqhk.co/jakufomego/ijhaNs0/foster_parent_appreciation_card_ideas.pdfIn PDF document text
    • https://sazadasixitabe.weebly.com/uploads/1/3/4/4/134404720/womesadobefu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384828/normal_604218ef14ae1.pdfIn PDF document text
    • https://cdn.sqhk.co/xozakatupab/tgciggh/kingdom_connection_ministries_conyers_ga.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/jgjYZAZ/toxalu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sebebajo.epizy.com/wenuzapogeko.pdfIn PDF document text
    • http://paxubar.rf.gd/53441583960.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_off00011366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11366 5240 bytes
SHA-256: 066f8a38cb9e756e18f3a35419c3f882efdac1b0d1df38a8e438c2109349581a
font_01_sfnt_off0001251a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1251A 10592 bytes
SHA-256: 62c80c36eaea17f546c2c90a050c90d0b9c6fa9699a01d3a8e4eb0376e7805a1

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