Malicious PDF — malware analysis report

Static analysis result for SHA-256 079ba8a618a2591f…

MALICIOUS

PDF

76.2 KB Created: 2021-05-18 21:24:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 79bb38acf739f9a1aff5ed7b87180d8b SHA-1: 9ae588d8ca6554c7e1d1b895a9b446aaa288a92c SHA-256: 079ba8a618a2591fc06b98bf03c590d9e64bd8fdd482c28a12a621290862fe60
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly indicate a phishing attempt disguised as educational material.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://lozipotod.ru/strik?utm_term=wordly+wise+3000+book+5+lesson+7+answer+key+pdf PDF link annotation
    • http://bakevez.22web.org/bookkeeping_and_accounting_crash_course.pdfIn PDF document text
    • https://gevexivojuler.weebly.com/uploads/1/3/4/4/134444242/964476.pdfIn PDF document text
    • https://fuzefiwojagolo.weebly.com/uploads/1/3/5/3/135308179/ligenelorok_vuregali_semowaba.pdfIn PDF document text
    • http://pegoluzalep.22web.org/gulomidoguvo.pdfIn PDF document text
    • https://ruxunomitebapat.weebly.com/uploads/1/3/1/6/131606858/panemugifa.pdfIn PDF document text
    • https://kuzosilu.weebly.com/uploads/1/3/2/8/132815793/negobisevozuren_norixokugepa.pdfIn PDF document text
    • https://jemaveroker.weebly.com/uploads/1/3/5/3/135391058/tesefepinigolu_pikumigesaze_vonon.pdfIn PDF document text
    • https://savibivo.weebly.com/uploads/1/3/1/3/131381036/dc0d4090901f7.pdfIn PDF document text
    • https://karuxuli.weebly.com/uploads/1/3/4/3/134377251/motabomijomojuguki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://golujaxi.epizy.com/movies_for_mobile_bollywood.pdfIn PDF document text
    • http://litolutu.rf.gd/cancionero_petrarca.pdfIn PDF document text
    • http://bumojito.rf.gd/gebiromalikipag.pdfIn PDF document text
    • http://puzuzebud.epizy.com/tasitugagasefububegoto.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/what_did_the_bobo_doll_study_show.pdfIn PDF document text
    • http://nanaxaj.rf.gd/25837787032.pdfIn PDF document text
    • http://jodonurinifos.epizy.com/xugagedake.pdfIn PDF document text
    • http://nowivopikuzud.epizy.com/cfop_method_step_by_step.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/4572287356.pdfIn PDF document text
    • http://vapovalexuma.epizy.com/black_and_white_printer_test_page.pdfIn PDF document text
    • http://vaxomuterok.epizy.com/refukad.pdfIn PDF document text
    • http://fozixomu.epizy.com/adobe_reader_for_windows_10_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/47170405111.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/how_to_do_photoshop_for_beginners.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_off0000e80a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE80A 5956 bytes
SHA-256: ee66221e1d0b1aa4b83f0a801df383072bb60d8639a03c21539946fe802ccd4b
font_01_sfnt_off0000fc85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC85 11324 bytes
SHA-256: a57fb7135030b3863870e384c73d4c3296c159d6362a94a92029465bd4c9bb07

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