Malicious PDF — malware analysis report

Static analysis result for SHA-256 9679e5c4b0e554f1…

MALICIOUS

PDF

80.7 KB Created: 2021-02-25 23:52:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: fcc6bbd894d13ebd7ce583d849d4f926 SHA-1: e59a45e8c5d5a422ee3282339553e0114d1f360d SHA-256: 9679e5c4b0e554f1a68cfd7e2753382dc91f5187d434af58218de61602a0ecab
126 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wb?keyword=basic%20electronics%20a%20text%20lab%20manual%20zbar%20pdf%20free%20download PDF link annotation
    • http://fakixigulidol.mywebcommunity.org/40860054098.pdfIn PDF document text
    • http://xuxetosufuzo.getenjoyment.net/gimikibatet.pdfIn PDF document text
    • http://xijulefabogi.getenjoyment.net/how_to_scan_any_barcode.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/international_journal_of_medical_sciences_and_current_research_pubmed.pdfIn PDF document text
    • http://mexicotop3.xyz/starwood_management_training_programlyext.pdfIn PDF document text
    • http://duplicwcnj.space/black_and_gold_boots_ladies5899a.pdfIn PDF document text
    • http://yatvoyya.fun/examen_planea_2017_respuestas_media_superiorfzfc3.pdfIn PDF document text
    • http://tefitagesev.mypressonline.com/35553200018.pdfIn PDF document text
    • http://ingmijn.com/powers_and_exponents_worksheets_7th_gradeqznmq.pdfIn PDF document text
    • http://blankid.ru/vilavowusegm15g.pdfIn PDF document text
    • http://ebay-coupon.ru/resivilejowadavigonowatij1vsd4.pdfIn PDF document text
    • http://rafupofamurawaf.mygamesonline.org/nuwogil.pdfIn PDF document text
    • http://gexopidikimo.mygamesonline.org/2002_lexus_es300_battery_change.pdfIn PDF document text
    • http://jikusofare.mywebcommunity.org/vaxepijum.pdfIn PDF document text
    • http://pubgmobiie.com/bizisexikipulegitvnxiv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duvuxosejoxogu.rf.gd/2756804721.pdfIn PDF document text
    • http://nununad.myartsonline.com/xufabedinekukada.pdfIn PDF document text
    • http://sidujulekefe.epizy.com/dorivonafaxazumabe.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_off0000e490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE490 6280 bytes
SHA-256: 67e7fc211805191e19d4fe7edf6f12112792b8fc6adcbe2d9dc8a8bfdf343ae5
font_01_sfnt_off0000fa20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA20 5700 bytes
SHA-256: fcf939049c71c2886ec1a77782462477cbcc08d63dd5be5913abf78aa7a0ebf7
font_02_sfnt_off00010d86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D86 11936 bytes
SHA-256: 6df3b979f8e01498f2819bff95e74f30a97fea309050360e70c652a6ebf27bd2

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