Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7d47bc23602b419…

MALICIOUS

PDF

75.9 KB Created: 2021-03-07 22:00:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 2d589dd20c9ef221f25a3114efbff9d1 SHA-1: 15eda482e70a2bda407dee8042b5c7b87a5d10c3 SHA-256: f7d47bc23602b419a834c8edc538821a792c7ea558d77ae4b8edc06b097ad6a5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign designed to redirect users to malicious content. The presence of a 'download button' heuristic further supports the idea that the document is designed to trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://midufefew.ru/wix?keyword=personal+statement+title+page PDF link annotation
    • https://goluluvofa.weebly.com/uploads/1/3/2/7/132712214/2dd33e341a2.pdfIn PDF document text
    • http://baltika-trans.ru/56797053326dsev7.pdfIn PDF document text
    • https://mazazujusuvazix.weebly.com/uploads/1/3/1/8/131856432/579528.pdfIn PDF document text
    • http://myfirstsite.xyz/london_bridge_wallpapers_for_desktopyyvf1.pdfIn PDF document text
    • https://goguribepolim.weebly.com/uploads/1/3/0/7/130739596/a6cf3d90.pdfIn PDF document text
    • http://cetapp.xyz/change_din_hd_video_songzfc43.pdfIn PDF document text
    • https://dekudabor.weebly.com/uploads/1/3/4/8/134893804/d717aa1e5.pdfIn PDF document text
    • https://safasisi.weebly.com/uploads/1/3/4/4/134472516/kalofax_zujobexebamukez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427086/normal_6024b263738fe.pdfIn PDF document text
    • https://fizabogozof.weebly.com/uploads/1/3/2/8/132815807/samimejile-nazudaxa-radozamu-gikason.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391954/normal_602c17aad73a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403541/normal_603f1dc60fe3b.pdfIn PDF document text
    • https://sefomaxezaniv.weebly.com/uploads/1/3/1/4/131483109/414457.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454162/normal_5fff98feb76fb.pdfIn PDF document text
    • https://tipirigemiwar.weebly.com/uploads/1/3/4/0/134016889/fusifefopud.pdfIn PDF document text
    • http://fruitslope.online/ac_dc_greatest_hits_mega0vks5.pdfIn PDF document text
    • https://mozakemu.weebly.com/uploads/1/3/0/7/130738716/lavojoxalo_xafewadev_vidosakivize.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ca30e0e0-ecf2-44ab-b6a2-fe26291458be.filesusr.com/ugd/34e21e_bb3ec87abbf442e382cc9a952f715c49.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef66be24-f04c-4169-bfb6-4bd91b705410/wibuboguru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/872b7b86-413b-4a60-aa32-ba94c5000080/tegirozivasapix.pdfIn PDF document text
    • https://357b8bef-7330-4cfe-b31d-389db25c4d5a.filesusr.com/ugd/4c76bf_63581f31b45d443db6f2de111b510b0d.pdf?index=trueIn PDF document text
    • https://30b7a97f-6117-4fff-8876-4b3c2220b6c6.filesusr.com/ugd/15cd4d_12220c6ded334e13b9e7b6806804c0b7.pdf?index=trueIn PDF document text
    • https://e5baaea7-7007-41de-9367-4ebf3ed55875.filesusr.com/ugd/8e1900_5d4da42117f948a294e29b7def4ce880.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7f7c722-608a-4bf1-b99a-097a363ed271/kebaxiwunoje.pdfIn PDF document text
    • https://c064424b-11a8-4e39-a524-24a74bcd733d.filesusr.com/ugd/54e393_6da65f89cd3b43b99c733d59720eea26.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_off0000ee30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE30 5140 bytes
SHA-256: 8bef2698de905f116306a16669b1ec882d4bf1abbf87842f16d3c03ca02483d5
font_01_sfnt_off0000ff93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF93 10136 bytes
SHA-256: 322e56acced3ed5ec9f5eef641cb80df4317b1bff3ccd5291854355075e02c1b