Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e221afc6f3f8d80…

MALICIOUS

PDF

69.9 KB Created: 2021-09-29 06:58:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: bb7b7077dd64ecd3e33caf9873d3e3fc SHA-1: e06edbdfd8fdd2303cbec1bb6b1625e1fb29ff21 SHA-256: 8e221afc6f3f8d807dd891e3a67034fa6ddf55197a094f4e47656477bd3cd6e2
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as malicious by ClamAV and ML classifiers, exhibiting characteristics of a phishing lure. It contains numerous links pointing to potentially compromised websites or disposable hosting, suggesting an attempt to redirect users to malicious content. The PDF_IMAGE_LURE heuristic indicates it's an image-only document designed to trick users into clicking, likely to initiate a download or redirect to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://valenciamaids.com/userfiles/files/65102130875.pdf In PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613b4b1ebf712---70534228501.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/93448941508.pdfIn PDF document text
    • http://weilandvloeren.nl/fckimages/roneweli.pdfIn PDF document text
    • https://happy-playground.gr/uploads/_uploads/files/47366015219.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/8nh5qe5d8t2okse0no033dl9s6/firininujarokotap.pdfIn PDF document text
    • http://masonhn.com/d/files/govanoruwofoxide.pdfIn PDF document text
    • http://abnig.friendship-match.com/upload/files/tixebolisilawudakin.pdfIn PDF document text
    • http://academiesutherland.com/userfiles/file/fumakimosu.pdfIn PDF document text
    • https://matratva.in/userfiles/file/vidixedewitebune.pdfIn PDF document text
    • http://majedalkarkhi.com/pics/file/nedizidaketikitaja.pdfIn PDF document text
    • https://silverbirdmarketing.com/pages/images/file/fuwezusugexa.pdfIn PDF document text
    • http://olynskiconstruction.com/pics/file/40958992094.pdfIn PDF document text
    • http://cjmfgxfollow.morefriendship.com/upload/files/xidomepulumufutezigap.pdfIn PDF document text
    • http://eventologia.com/userfiles/files/61519546360.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/161538ec12c48d---viwomudopumu.pdfIn PDF document text
    • http://panel2conso.com/userfiles/file/noxiwebiwegotepibipef.pdfIn PDF document text
    • https://vico-real-estate.com/ckfinder/userfiles/files/29282595169.pdfIn PDF document text
    • http://werkkledingverkoop.nl/images/docman/files/94219683628.pdfIn PDF document text
    • https://guptajimarriagebureau.com/userfiles/file/90831204659.pdfIn PDF document text
    • https://autoprofi.ua/userfiles/file/73688198241.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1613d0ee905d4c---1545988088.pdfIn PDF document text
    • http://studioferrato.it/userfiles/files/sudunuzeririgasuvafole.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/b2ec852bb0ba06162acdf71e5beb8c6b/kezelegumopet.pdfIn PDF document text
    • http://www.centralperdana.com/file/tuxararatupetopovutaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=reading+comprehension+for+upper+intermediate+students+pdfPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b45f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB45F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC71 14124 bytes
SHA-256: 05a4df20da03d319c6a32236cb8a05096e0585305ba32b9af95a3d5083368072
font_02_sfnt_off0000ef80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF80 11164 bytes
SHA-256: f932ea4e8983b451d1205e11d69498f08327f9b50f68f116c5511e361c4b3bd5

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