Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7b4ea73b5fffe31…

MALICIOUS

PDF

79.0 KB Created: 2021-03-10 19:05:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6de660e336d7c4a629c217775070c229 SHA-1: 672313cf9d73e5c0db68e4b3c8697ab17458ab5e SHA-256: a7b4ea73b5fffe310fcb1d551fe0f8e5b78fd319dff4167e7c01423d70f57e99
164 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms or phishing campaigns. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/award?keyword=tecnica+septoplastia+pdf
    • https://kizubunutasi.weebly.com/uploads/1/3/5/3/135348794/de0bff6e.pdf
    • https://wixoxane.weebly.com/uploads/1/3/4/7/134734379/4990837.pdf
    • https://kebufuwotum.weebly.com/uploads/1/3/4/0/134040355/potesud.pdf
    • https://static.s123-cdn-static.com/uploads/4405687/normal_6007e5d825983.pdf
    • https://static.s123-cdn-static.com/uploads/4458428/normal_5fedf7d0d43d8.pdf
    • https://static.s123-cdn-static.com/uploads/4420764/normal_5ff9de061eab9.pdf
    • https://gepavemu.weebly.com/uploads/1/3/4/8/134861499/fokepabisemaxemepof.pdf
    • http://premiumpornclips.com/pipewubijllwd.pdf
    • http://terugate.mypressonline.com/mixekap.pdf
    • http://myirn.icu/62353455651kz6dk.pdf
    • http://mujododaziwato.scienceontheweb.net/fopamuginusugulidav.pdf
    • http://organicsss.space/2004_dodge_ram_1500_5.7_oil_capacityf5fyz.pdf
    • http://ultra0.space/46816764550yokw6.pdf
    • http://macsk.space/dafiwgbzx0.pdf
    • https://tiruvodeg.weebly.com/uploads/1/3/4/8/134892329/e793a.pdf
    • http://midarujiwuvi.mygamesonline.org/84472447865.pdf
    • https://xalitive.weebly.com/uploads/1/3/4/3/134320973/7873548.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2221a244-0d9d-4225-ae6e-a1bc1e49c28d/city_of_ashes.pdf
    • https://uploads.strikinglycdn.com/files/bdfcd8f5-bde0-4d00-94e8-798e8fddf10a/94888987493.pdf
    • https://uploads.strikinglycdn.com/files/30b282d2-c4c0-4077-9767-61e4b4f560be/bibatuzofufep.pdf
    • https://uploads.strikinglycdn.com/files/c824e805-03e6-4c6e-8d78-ae1040afd3c5/quiero_estar_seor_en_tu_presencia_flor_y_canto_acordes.pdf
    • https://uploads.strikinglycdn.com/files/cf729b5c-f051-47d1-af12-ac946a88fad7/rinnai_rur98i_service_manual.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9ea.bin
cfd84ed895108d1daa6c2a0cdf280c315c18f7c8fd9e79ee69a9e159b3426542		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EA 5000 bytes
font_01_sfnt_off00010b03.bin
7e935807fb4662c5b02d780c7c479447f4f7bd7e1cbf16ecaee67d6a80dddf72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B03 10408 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.