Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fb7f7ec8dff0a85…

MALICIOUS

PDF

85.1 KB Created: 2021-04-18 21:53:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 431f16cf4b685a07960454c2bd503158 SHA-1: 4a31d0b1b01021d8b77cc23afe859e7d7224fe05 SHA-256: 0fb7f7ec8dff0a854b6f79b48d37976b6530cacd7e4a417fa2a692610c4b6c4b
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm and a phishing/malicious document. It contains numerous external URLs pointing to disposable hosting and Weebly domains, suggesting an attempt to distribute malicious content or phish for information. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/strik?utm_term=how+to+fix+jammed+gun+dayz+ps4 PDF link annotation
    • https://cdn.sqhk.co/xepubijiko/viajaqV/jofoni.pdfIn PDF document text
    • https://cdn.sqhk.co/kinanekoxo/ihjZicb/device_help_services_app.pdfIn PDF document text
    • http://xubajur.mygamesonline.org/68174943409.pdfIn PDF document text
    • http://nokasosozigof.mypressonline.com/uvu_training_guide_free.pdfIn PDF document text
    • https://moturepuka.weebly.com/uploads/1/3/1/8/131871952/8724591.pdfIn PDF document text
    • https://daxogane.weebly.com/uploads/1/3/2/8/132815110/1940019.pdfIn PDF document text
    • https://cdn.sqhk.co/zerurukoraju/hejbjgv/dawabizubesipuga.pdfIn PDF document text
    • http://tadosuzewamu.medianewsonline.com/pofufivisibule.pdfIn PDF document text
    • http://zakewabo.scienceontheweb.net/xovoruga.pdfIn PDF document text
    • https://cdn.sqhk.co/puzukebejas/jgdHhcN/82631693647.pdfIn PDF document text
    • https://nowigusoludi.weebly.com/uploads/1/3/4/2/134266380/4346228.pdfIn PDF document text
    • https://cdn.sqhk.co/judawube/KGjf2jj/46774383955.pdfIn PDF document text
    • https://cdn.sqhk.co/lomokubaf/4vcQFjg/47045952967.pdfIn PDF document text
    • https://cdn.sqhk.co/puxolika/gigjFoO/dutodez.pdfIn PDF document text
    • http://fovikoxesaweziz.medianewsonline.com/how_much_time_to_learn_matlab.pdfIn PDF document text
    • https://vunorozixu.weebly.com/uploads/1/3/1/1/131163876/433617.pdfIn PDF document text
    • http://tuduvodakep.mypressonline.com/kuraxasorofoliwu.pdfIn PDF document text
    • http://fidenenaxemol.iblogger.org/apollo_twin_mk2_solo_review.pdfIn PDF document text
    • http://lomidal.mygamesonline.org/makkar_ielts_speaking_jan_to_april_2020_download.pdfIn PDF document text
    • http://xepewifub.mygamesonline.org/95042084099.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://vezexosewomex.epizy.com/25894498658.pdfIn PDF document text
    • http://ranemojak.epizy.com/77249349167.pdfIn PDF document text
    • http://mimubokufalow.rf.gd/british_council_ielts_reading_test.pdfIn PDF document text
    • http://matewedidoxeber.onlinewebshop.net/beethoven_sonata_no._30_in_e_major_op._109.pdfIn PDF document text
    • http://xenamufilas.rf.gd/artificer_dnd_5e.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_off0000ffb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB3 5668 bytes
SHA-256: 8e44bb776009ae264c5729de09f6c02ac6404c933cf325357284856557a56459
font_01_sfnt_off0001132c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1132C 11200 bytes
SHA-256: 939a8d8bb30e2376add62304f754ac8a746222744e2b3b635b08f8e215da9936
font_02_sfnt_off00013943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13943 3404 bytes
SHA-256: 8327bb9f2f615ad2e7c9a7c2af155596a448e664cec7e594b1d2ff139273b342