Malicious PDF — malware analysis report

Static analysis result for SHA-256 a98f869cf4a3fb7f…

MALICIOUS

PDF

83.5 KB Created: 2021-03-03 17:19:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f0bce687e792b677738090ff2a3d8da7 SHA-1: 24bc752386d80a053cf4ee9d61ceba0d53a3f0b6 SHA-256: a98f869cf4a3fb7f0edafca195530f66c866ea290757516078b0f2d1e1853c76
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with one prominent link suggesting a phishing or scam attempt related to a specific search query. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. No scripts were extracted, but the presence of many external links points to a redirection or download mechanism.

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://jacksth.ru/strik?utm_term=philips+universal+remote+code+for+arris+cable+box PDF link annotation
    • http://fuvesozufinefi.medianewsonline.com/lakogagojujuwumorotifezim.pdfIn PDF document text
    • http://xoziduso.mypressonline.com/4217304762.pdfIn PDF document text
    • https://redulexaxoxega.weebly.com/uploads/1/3/0/8/130874010/4005526.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449181/normal_6003b5f5544b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486765/normal_603600b614fa4.pdfIn PDF document text
    • http://kevifiregerufug.scienceontheweb.net/free_autocad_commercial_kitchen_blocks.pdfIn PDF document text
    • https://vamalogobiw.weebly.com/uploads/1/3/4/6/134696595/rafatexosutopu_semeviwilelufu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dumupa/57874120078.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/47608765525.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/novutugunusojebavojuko.pdfIn PDF document text
    • http://sidepojedava.myartsonline.com/gepamejuzeni.pdfIn PDF document text
    • http://zasuwunal.myartsonline.com/46239312460.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/58201613664.pdfIn PDF document text
    • https://s3.amazonaws.com/gogunabones/petafesena.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/kadajesozazen.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/sap_hana_administration_tutorials_point.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/harris_bitcoin_miner_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/freelance_writing_jobs_in_india_work_from_home.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/brayton_cycle_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/ncert_books_online_purchase_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/black_long_sleeve_short_formal_dress.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_off0001073d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1073D 5664 bytes
SHA-256: 669d5de3df13d9398c62def0ee3411612beb5ac844766119afd385941db33657
font_01_sfnt_off00011a54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A54 11992 bytes
SHA-256: e86719711ab67964b00c0a5c059b019beaefdf7f081fbbd62b112a893563596e

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