Malicious PDF — malware analysis report

Static analysis result for SHA-256 08d706dcd526d8da…

MALICIOUS

PDF

77.2 KB Created: 2021-03-13 23:47:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 7ab847f2c036959918eeb14e3e7021c3 SHA-1: b16788059b2c56a13a532f81416870bb14a2b4f0 SHA-256: 08d706dcd526d8daa2e0e0ecf25ea6e49b2c22274a4bf8a3b8dbfc85030c4584
134 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to trick users into downloading a payload disguised as a font. No scripts were extracted, but the PDF structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gimoguvi.ru/123?utm_term=basileus+font+free PDF link annotation
    • https://fusorebumobem.weebly.com/uploads/1/3/3/9/133986296/didavozez.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369191/normal_5ff1e26173a0c.pdfIn PDF document text
    • https://cdn.sqhk.co/dejijadu/hj5rhdF/pentagon_federal_credit_union_15_year_mortgage_rates.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449793/normal_6004cb5d2262a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456685/normal_60332f708a261.pdfIn PDF document text
    • https://cdn.sqhk.co/jojevirelo/hfaGaRg/44424577979.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378618/normal_603801abbd9db.pdfIn PDF document text
    • https://zeberafuduzugag.weebly.com/uploads/1/3/2/6/132682167/ragimukewerube-xoxosun-jalalutalelima.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxumisi/Rkgdupy/wuzelup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403940/normal_601b03b4c39e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369306/normal_6048159f7580c.pdfIn PDF document text
    • https://tujulita.weebly.com/uploads/1/3/4/6/134687611/zuvovakagokebu-pegusefuluj-kokovoniz.pdfIn PDF document text
    • https://cdn.sqhk.co/suvotoruwot/ehbjfgj/kaposefikokojamalimamo.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwefuxab/jcjdjfX/fastest_cars_under_5k_australia.pdfIn PDF document text
    • https://wuliwedifa.weebly.com/uploads/1/3/4/7/134753749/1947317.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500187/normal_601f13fdba917.pdfIn PDF document text
    • http://dulexip.22web.org/4386035343.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bidusopevix.epizy.com/12048214416.pdfIn PDF document text
    • http://defiretojeven.rf.gd/garmin_vivofit_4_vs_fitbit_charge_3.pdfIn PDF document text
    • http://tolibewi.epizy.com/nagekedi.pdfIn PDF document text
    • http://mewozukejos.rf.gd/pimiwavekemodugebuninev.pdfIn PDF document text
    • http://jitoritobo.epizy.com/86411601188.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_off0000f1fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FC 4808 bytes
SHA-256: 7c7cd3f23f1fec2f6403a599338a1da6fedcf6c77fd4dfd4e546572f4dd75c8e
font_01_sfnt_off00010262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10262 11452 bytes
SHA-256: fffb3bde22d41a893ab6200d5cf1ca3f80ed3f04d6d9a096f9ad8dfd9b015d2a

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