Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1c6fffdb479494f…

MALICIOUS

PDF

84.8 KB Created: 2021-03-16 09:53:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 037cc9677a5515719ab1d6ba0a41683a SHA-1: 5a6db9b9ed7c67b1530ea67b4595b9290dd47eb4 SHA-256: a1c6fffdb479494f394fce02e1437c648772909f73459f8a8a2edeb8e346d6a9
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document is flagged as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. It contains embedded URLs, one of which is a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be a lure related to an application form, aligning with a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/123?utm_term=access+to+neighbouring+land+act+application+form PDF link annotation
    • http://kowojolajamuv.getenjoyment.net/how_to_write_a_bakery_business_proposal.pdfIn PDF document text
    • http://weinmvc.net/model_3_tesla_price_2021pxann.pdfIn PDF document text
    • http://jovefupe.mywebcommunity.org/63053007497.pdfIn PDF document text
    • http://ueuniti.xyz/68957127017msyhx.pdfIn PDF document text
    • http://form-copyrightservices.com/complete_english_grammar_for_dummiesreq82.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fobonerenajob.epizy.com/acerbo_nimis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58fec914-25b4-40f2-8a8e-f216ec3450b1/puwaruvagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50fb2a66-d490-4cb3-bb8c-f2feb4f13890/zatisipemorudug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b24278e9-08ed-4afc-b5c0-b8b172f4d202/nail_salons_near_me_open_now_cheap.pdfIn PDF document text
    • http://rusuxagek.rf.gd/69869853223.pdfIn PDF document text
    • http://ravizovagusemav.epizy.com/abceso_hepatico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6701d369-faf8-41da-bcd7-f445a7d85bdd/gunusev.pdfIn PDF document text
    • http://poliwukumepi.rf.gd/hp_laserjet_p2055d_driver_mac.pdfIn PDF document text
    • http://nabenejajoko.myartsonline.com/rodaripuxujezaxasorop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1de133fd-6851-4f45-94e4-e4bc1490fbd8/navien_ncb_240_specs.pdfIn PDF document text
    • http://pozidijapepore.atwebpages.com/44695494903.pdfIn PDF document text
    • http://zujuguj.epizy.com/download_livro_simplesmente_acontece.pdfIn PDF document text
    • http://wexugemo.epizy.com/iphone_xs_wallpaper_4k.pdfIn PDF document text
    • http://zubiluwetij.myartsonline.com/gubux.pdfIn PDF document text
    • http://pabudixobo.epizy.com/wd_my_cloud_ex2_ultra_4tb_review.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_off00010c85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C85 5700 bytes
SHA-256: 266bb7747692c1ff2ee390255c66c6945dd08bbcc8595e2347fdef81f318a427
font_01_sfnt_off00011fbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FBD 10676 bytes
SHA-256: 442b3dc33c29083ce272b05f57e56f1f78eca17a1beeac61d0b863d1671e2f48

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