Malicious PDF — malware analysis report

Static analysis result for SHA-256 66ff4151da4819c8…

MALICIOUS

PDF

81.1 KB Created: 2021-03-05 19:19:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0f0cda5bc6d387bcd4d583739e001653 SHA-1: 50c68de52dedcbb893fe07dc19aeb00c5672b03d SHA-256: 66ff4151da4819c85430b2ff4a6d6ab5c9980e9a79b0faa295f06939a082e0c0
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm designed to redirect users to potentially malicious sites. ClamAV and ML classifiers strongly indicate malicious content, specifically a phishing or trojan distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit users through deceptive content, likely leading to a phishing or malware download scenario.

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://jumiwimov.ru/aws?utm_term=technical+communication+today+pdf+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4484999/normal_5fd70cceadb46.pdfIn PDF document text
    • http://klyshsheff.xyz/digital_microfluidic_biochipsfq7h8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484103/normal_5fca93214ebef.pdfIn PDF document text
    • http://winoorama.website/45838770717l2prc.pdfIn PDF document text
    • http://prodit.space/wafufatoginugifse63v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490519/normal_601966b12f462.pdfIn PDF document text
    • http://netlysy.online/zusutezeluxobovifog07gyn.pdfIn PDF document text
    • http://suzamajotibe.mywebcommunity.org/the_sheets_where_we_made_love_lyrics.pdfIn PDF document text
    • http://newberginvestmentproperty.com/ruzegemeu66js.pdfIn PDF document text
    • http://fruit-ita.fun/7719609697biow0.pdfIn PDF document text
    • http://kujamemapevubu.mypressonline.com/760gm-p34fx_ms-7641_drivers.pdfIn PDF document text
    • http://mebets.xyz/honeywell_thermostat_rth6580wf_wiringp0hz6.pdfIn PDF document text
    • http://bit7.top/angry_birds_classic_game_apkpure4swyc.pdfIn PDF document text
    • http://deladinabixek.sportsontheweb.net/pesujasasazimibi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367013/normal_5fc61402d2843.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366400/normal_5feb2cae87f44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415046/normal_6023f2b5da67a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://91ca87c2-c493-4616-adaa-fbcec45394e1.filesusr.com/ugd/6116da_fd2b6365115d411fb5c040b31d229eb1.pdf?index=trueIn PDF document text
    • https://7fe6b731-3703-45da-bcbe-faf39b4d3392.filesusr.com/ugd/880a7e_008d2ed884e948e79c38b8ae69e9eaf3.pdf?index=trueIn PDF document text
    • https://562c2315-396f-49d1-9e45-1236e049cb13.filesusr.com/ugd/ec0012_0db15bae444c4eca949cab834d8bfb90.pdf?index=trueIn PDF document text
    • http://nizowozutagele.atwebpages.com/the_dead_and_the_gone_book.pdfIn PDF document text
    • http://dezinolabebosod.atwebpages.com/unreal_engine_4_fps_tutorial_c.pdfIn PDF document text
    • https://6754c94d-8795-460a-880d-d127bb37d4d4.filesusr.com/ugd/2383dc_bf726633176744d5b3a928be078df2d1.pdf?index=trueIn 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_off0000fdf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF0 5268 bytes
SHA-256: a3d16b396318c57ba37c42e3993f0e752eb9972b78ec60f0367d901d19596535
font_01_sfnt_off00010fbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBE 11672 bytes
SHA-256: 4e4e7cc53422eb7d286d6ebedab4582c7458e78520ec60f518e2451f9b40eaf9

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