Malicious PDF — malware analysis report

Static analysis result for SHA-256 97ec6ddaf7e572e5…

MALICIOUS

PDF

87.2 KB Created: 2021-03-17 11:00:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: cb18ca1daf5a55f9f9e4a6ab043e1f8e SHA-1: d32505b5e68701a6970287dac68da6539f13c73a SHA-256: 97ec6ddaf7e572e5c762731ab72a4881dde0f49b2519af7e7a7c1193efe86615
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, suggests a lure related to educational search terms, indicating a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://golowaki.ru/wix?keyword=1.2+puzzle+time+answers+big+ideas+math+blue PDF link annotation
    • https://cdn.sqhk.co/lewiwifo/gNFXTge/95062116996.pdfIn PDF document text
    • http://nejurizedutopi.iblogger.org/buffalo_cutting_machine_video.pdfIn PDF document text
    • https://cdn.sqhk.co/tavikebepo/mgcihYh/delepuvurafiratanedoroji.pdfIn PDF document text
    • http://fumigatoff.online/attack_on_titan_manga_character_listw3oxv.pdfIn PDF document text
    • https://cdn.sqhk.co/nunemiziku/SBtiaJu/bigusodaxodexifurof.pdfIn PDF document text
    • http://wonder-ita.space/76593334036ilekc.pdfIn PDF document text
    • http://legendnat.space/33321968602zr4sv.pdfIn PDF document text
    • http://flowerport.store/78134564865qwfdg.pdfIn PDF document text
    • http://zesijesagevonot.22web.org/72122763557.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ad323f3e-245e-4e3c-8b16-de91fefec063.filesusr.com/ugd/5ea691_4067faa6fbcf4511805c1913f486dce7.pdf?index=trueIn PDF document text
    • http://xapafov.epizy.com/81894221146.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/461df050-486e-4d26-93ee-778408780611/9593916727.pdfIn PDF document text
    • https://c245485c-e1a4-4c5a-9a2a-c465a95e53c8.filesusr.com/ugd/25f824_c83425746ccd46479eac80f3a673bb96.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1c85d1d-6776-495f-b4ab-03f41e234d31/fakutimijiziboxelonudaji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1926fea-2049-4320-be90-81064fe107f6/hillsborough_county_school_closure_eta.pdfIn PDF document text
    • http://deravamosu.rf.gd/ed_rosenthals_zero_tolerance_herbal_pesticide_concentrate.pdfIn PDF document text
    • https://0503187d-52cd-4237-9521-a3cb9bf551ae.filesusr.com/ugd/5bb01c_567c29c51e034bfc9b586cde0b6fe226.pdf?index=trueIn PDF document text
    • https://d6236f05-450e-4b96-9875-1783d83c708b.filesusr.com/ugd/912de2_9927def403ed4950b647cb20f600d53f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1aec4b3e-a8d5-4a7e-bc64-26b798fa0bbf/kiduvawamemazisunaxivis.pdfIn PDF document text
    • https://6f0a1f77-3195-4c90-aae7-8e5805bb56bd.filesusr.com/ugd/f94fd0_016b428155fb4adf991b5faf3ebfae48.pdf?index=trueIn PDF document text
    • http://xunevonobi.epizy.com/48869574144.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1cef8ca-437c-4f9d-b137-205dc2697a8f/how_often_breastfed_babies_poop.pdfIn PDF document text
    • https://92ddf5cc-4ce7-4caf-b117-8241c553a727.filesusr.com/ugd/42bae0_e0cabf15e34c45419f9bfa294ade1213.pdf?index=trueIn 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_off00010ea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA3 5776 bytes
SHA-256: aec66cd8d301c0481765953d75fab7d991978672feb40634e31f893ba8eee153
font_01_sfnt_off00012239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12239 13980 bytes
SHA-256: 694145360ee361657e4ebfd8a7750eab623e16746bbc1dfdcbe69eea9059b7f5