Malicious PDF — malware analysis report

Static analysis result for SHA-256 d229c9951836ec76…

MALICIOUS

PDF

76.7 KB Created: 2021-03-07 16:49:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 3fb82d064b87bbe80c1901e66198fc23 SHA-1: 0a64fe00b26302e0cc122822eeaf4afcb349b604 SHA-256: d229c9951836ec766e65c3e5d2b5e33d4969ada4cecbacbfb683532f2a8e5e24
134 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a strategy of using numerous links on disposable hosting, likely to obscure malicious intent and improve search engine visibility for lures like 'unblocked movies download'. No scripts were extracted, but the PDF structure and embedded URIs are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://soxebez.ru/wix?keyword=unblocked+movies+download+google+sites PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4391899/normal_601f8de0e83cc.pdfIn PDF document text
    • http://gogejevi.iblogger.org/the_assassination_of_jesse_james_parents_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/nSDJkhg/80393593301.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404528/normal_6030ed902fb0d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484093/normal_5fe2256fcf81f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452373/normal_600bcff9aab10.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370275/normal_5fe390f65420d.pdfIn PDF document text
    • http://tijudiwulewanuw.getenjoyment.net/25981084920.pdfIn PDF document text
    • https://mixojokujize.weebly.com/uploads/1/3/4/3/134387696/6613347.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421940/normal_6013b91cad4e5.pdfIn PDF document text
    • https://kefubawivamati.weebly.com/uploads/1/3/5/3/135304753/gosunuvesapubikesa.pdfIn PDF document text
    • http://ziximotizaned.medianewsonline.com/91668871439.pdfIn PDF document text
    • http://zigapajuxijado.mywebcommunity.org/manual_compressor_ingersoll_rand_ssr_ep150.pdfIn PDF document text
    • https://cdn.sqhk.co/wibetaxor/Bunvugg/foseduzeloxidafivagegob.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385633/normal_5fcc6b49c5567.pdfIn PDF document text
    • https://cdn.sqhk.co/sunomedude/iezefHF/rotator_cuff_tendonitis_physical_therapy_protocol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sabiwilurase.atwebpages.com/the_raven_cycle_book_1_free.pdfIn PDF document text
    • http://fiforeru.atwebpages.com/will_there_be_a_twilight_6_2020.pdfIn PDF document text
    • http://dolasuwukino.epizy.com/24528770240.pdfIn PDF document text
    • http://kititone.epizy.com/66491779860.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_off0000ef95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF95 5508 bytes
SHA-256: 1c301a246fd59b26289de769c6056391409fd5bc2cd24648ce4b450c79a9620a
font_01_sfnt_off0001025a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025A 10212 bytes
SHA-256: 09185166f29568cee9e73b182514f2c9afcc9592fa50374ee87c63fa84737cd2

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