Malicious PDF — malware analysis report

Static analysis result for SHA-256 efd3d700d583e8c2…

MALICIOUS

PDF

74.1 KB Created: 2021-03-22 10:37:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: e00cc293ecf3e0e5a47db4e6d6886d9e SHA-1: aa3acdc00c908532e48641922fa0d76722d7a067 SHA-256: efd3d700d583e8c220a3b5c0d0b0de93498d2b12484e8503b9f68ec8859245b2
186 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many hosted on disposable domains, suggesting a link farm or phishing lure. Heuristics indicate it's a link farm and a callback phishing lure, with ML classifiers and ClamAV flagging it as malicious. The presence of 'powershell_scripts.pdf' in the document text, alongside suspicious URLs, indicates an attempt to trick users into downloading further malicious content, likely by exploiting PDF vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://xajibur.ru/wix?keyword=cleveland+plain+dealer+death+notices+today PDF link annotation
    • http://maxitis.22web.org/checkbook_register_template_for_mac.pdfIn PDF document text
    • http://afracheat2.xyz/romeo_and_juliet_character_chart_personalitylvvqr.pdfIn PDF document text
    • http://vodabutopidaru.getenjoyment.net/lenemadowenaviwijik.pdfIn PDF document text
    • http://artdebug.site/the_heroines_journey_workbookhvzl0.pdfIn PDF document text
    • http://tvoyoproc.fun/772372324465zgf4.pdfIn PDF document text
    • http://muzibatixabu.mypressonline.com/tukug.pdfIn PDF document text
    • http://collegegraduatecentraldating.com/3334028881201fby.pdfIn PDF document text
    • http://fruitslope.online/wotisiyl6ea.pdfIn PDF document text
    • http://bitsracing.net/mecanica_vectorial_para_ingenieros_dinamica_hibbeler_12_edicionrvw4a.pdfIn PDF document text
    • http://wawikoduvebakap.onlinewebshopIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xulezudo.epizy.com/38934509878.pdfIn PDF document text
    • https://bf68d742-fb98-404a-ab47-1dcf24f7df52.filesusr.com/ugd/83e7fd_818ea901e59a4b7593b94fd7d712ba73.pdf?index=trueIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/windows_8.1_enable_powershell_scripts.pdfIn PDF document text
    • http://wawikoduvebakap.onlinewebshop.net/9040718782.pdfIn PDF document text
    • http://solezod.myartsonline.com/eukaryotic_cell_cycle.pdfIn macro / runtime command snippet
    • https://662517ce-f374-4037-aebd-99b1dbe00103.filesusr.com/ugd/0c4177_bb999714bebe4788bcbf8d1b9b9d09a8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a02cd3e-23f1-4ab2-875f-0e5885f73acf/snapper_riding_mower_for_sale_ebay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e89db1f5-5998-4162-8127-3dc9d76861ee/how_long_i_have_to_wait_to_exercise_after_eating.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b7bc0ec-a8e3-474c-91ce-197ef8130ae0/17151937752.pdfIn PDF document text
    • https://a32e93c2-1aa3-4149-af29-aa5d163ab988.filesusr.com/ugd/40336e_2fc234427a994f04bfa2bfa3fed86d6b.pdf?index=trueIn PDF document text
    • https://937a8a2d-b41a-4163-aff8-eda6db263557.filesusr.com/ugd/21e6f2_e918eacbeacd4f999b68491750c05328.pdf?index=trueIn PDF document text
    • https://97a45c9e-1ab5-462a-bfe2-fded34b9a8b9.filesusr.com/ugd/b50c55_d16eda0578694ef099676ca141dc4ed9.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_off0000e283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE283 5228 bytes
SHA-256: a667e4989688fc324a2a6b1fc18ec56cf3176b669a6137c6cdcbefd664ec6fde
font_01_sfnt_off0000f44e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF44E 11312 bytes
SHA-256: 789f2fa147f2fb8b006cff82cf1823c824c3169398f0bb13dd3b1bed23fa61bf

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