Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4d0ef37ccc85ef0…

MALICIOUS

PDF

95.1 KB Created: 2021-04-05 09:04:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 98ac8bc5dbfaf2bda626295d78625222 SHA-1: a82188dc421ae087d960296ea9db98670e4e8016 SHA-256: d4d0ef37ccc85ef054fa69fa76862d1d223d4728ef00333f0ddd471fab963f79
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with heuristics identifying it as a link farm hosted on disposable domains, suggesting a phishing or malware distribution scheme. The presence of multiple unknown reputation URLs further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://fokemale.ru/123?utm_term=uniquely+you+dress+form PDF link annotation
    • http://zanartcc.net/europe_car_driving_simulator_mod_apk0uzge.pdfIn PDF document text
    • http://bestcreditcheck.info/64476480635h2xem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379486/normal_6046865564509.pdfIn PDF document text
    • http://judijemavup.22web.org/5583799770.pdfIn PDF document text
    • http://opensalon.xyz/43770764681gl1ye.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477913/normal_600c7e82456b4.pdfIn PDF document text
    • http://remontlegko.info/89342988611fc12o.pdfIn PDF document text
    • http://meriline.store/80200524759ucij9.pdfIn PDF document text
    • http://idealslim-italiaoficial.site/wijuzugawurepipameduweqnmgu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488317/normal_5fcbad62ce4f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409811/normal_601889f5f172f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sorogamat/afro_cuban_rhythms_drum_set.pdfIn PDF document text
    • https://aa6eca1a-c690-4a36-985e-a873157a80b3.filesusr.com/ugd/081493_cb27ad1deeb74b92b7fb6e5178848578.pdf?index=trueIn PDF document text
    • http://lorasis.epizy.com/45553105987.pdfIn PDF document text
    • https://e590c0d9-b694-44fb-9862-47327b30d8b0.filesusr.com/ugd/89363e_367c859b05a84f188ca803507e71e654.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/manual_tp-link_tl-wr840n_espaol.pdfIn PDF document text
    • https://a04ad255-06d6-4b17-97e7-91173d300295.filesusr.com/ugd/6864df_adb7b97c03534ce6adc0c5d934efd985.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/craftsman_leaf_blower_fuel_oil_mix.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/33219667687.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/zovabagemufaf.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_off00012abd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ABD 4864 bytes
SHA-256: 106f6f6cc38498e6fa8ca9d41478d258838571fa5c6ec4bb3a37ba62f84d8c07
font_01_sfnt_off00013b2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B2E 11096 bytes
SHA-256: ffbafae6bfc02511a58409c5539d611b17d125802167b02f480cd086f1508692
font_02_sfnt_off000160f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160F1 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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