Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab2ada2a1440ee3e…

MALICIOUS

PDF

77.8 KB Created: 2021-09-23 05:56:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e1946366084abdebc0585c2b217a6e57 SHA-1: 3697fe97dee45d6ce9435cef71ea0b8169f915f9 SHA-256: ab2ada2a1440ee3e852dc7fbf4c4fa29ae0aa51088e712d01c6bff3d9e918ff6
164 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to external PDFs hosted on compromised or disposable domains, suggesting a link farm designed to distribute malware. The ML classifier and ClamAV detection strongly indicate malicious intent, likely a phishing or trojan delivery mechanism. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with a malicious document designed to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • 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.
  • 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 http://awfiowv.love-mrt.com/upload/files/78502011869.pdf In PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131a0e0b86a1---97715797516.pdfIn PDF document text
    • https://kiptep.ru/file/74957384356.pdfIn PDF document text
    • http://studiosimonepantaleo.it/userfiles/files/gawivabakixijubimewevi.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141d5335e579---17202673504.pdfIn PDF document text
    • https://taechoclub.com/FileData/ckfinder/files/20210922_335D15F0A091B9BF.pdfIn PDF document text
    • http://dragonspond.com/uploads/files/13502709607.pdfIn PDF document text
    • http://tiramisu-o.com/yamituki-n/uploads/files/40784644375.pdfIn PDF document text
    • https://manajrgvaaradhi.com/cms-uploads/files/77700438561.pdfIn PDF document text
    • https://luatsuavina.com/userfiles/file/judabaladoxewitisu.pdfIn PDF document text
    • https://bazab.ru/ckfinder/userfiles/files/rolix.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613aa688a6f1b---78921240071.pdfIn PDF document text
    • https://sherwoodchamber.org/ckfinder/userfiles/files/mipafuwuwaxok.pdfIn PDF document text
    • http://boldogelet.hu/media/vobajetafofedafovonusoda.pdfIn PDF document text
    • http://smelawservice.com/file_media/file_image/file/85081636374.pdfIn PDF document text
    • https://magerp.org/upload/files/fupiza.pdfIn PDF document text
    • https://fzclicks.com/demo/files/editor/file/todixumoku.pdfIn PDF document text
    • http://japan-railpass.info/images/blog/file/50302567449.pdfIn PDF document text
    • http://ver9ctrl.sonikgps.com/ckfinder/userfiles/files/bezomiwonofijimowux.pdfIn PDF document text
    • http://deeringbayrealestate.com/userfiles/files/89722464478.pdfIn PDF document text
    • http://pokeocncafe.com/uploads/files/79614051399.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=download+sims+freeplay+save+game+level+52PDF 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_off0000c8f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F1 11264 bytes
SHA-256: b7d4c2b9ad9d1355c23d7e04f5dbbea24ab4475749fe010c22bea74c013a6c0b
font_01_sfnt_off0000e33f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE33F 17256 bytes
SHA-256: 8f7153908c5047b07a0da194b16cd1df98a2b62d3ea0e0784885935674e90363
font_02_sfnt_off00010fd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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