Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cc0691da3d60ab5…

MALICIOUS

PDF

99.0 KB Created: 2021-03-19 20:44:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 4f1bc795a8402eeaf9adc0f950b33db9 SHA-1: 51332b60c5831c1c390a0ce92ae882c26529c099 SHA-256: 7cc0691da3d60ab56ef097d783d2f6afcf75e86216c57e00443225ccb65a2406
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for link farms and phishing lures, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the presence of embedded URLs and the heuristic 'SE_LOLBIN_RUN_COMMAND' suggest the document is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • 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.
  • 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.
  • 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://jacksth.ru/award?keyword=bpsc+question+paper+pdf+2020 PDF link annotation
    • https://tugalebuwe.weebly.com/uploads/1/3/4/0/134012885/vusepef-tidogogozomojox.pdfIn PDF document text
    • https://cdn.sqhk.co/sovanoniwuva/ejjgyUC/best_basketball_toy_games.pdfIn PDF document text
    • https://cdn.sqhk.co/wejagamewo/hjbiihf/rudibigewugibozig.pdfIn PDF document text
    • https://cdn.sqhk.co/gotofebelu/Z78AztI/nugirimibugoligowes.pdfIn PDF document text
    • https://dubibezu.weebly.com/uploads/1/3/1/4/131453247/d0939f0.pdfIn PDF document text
    • https://cdn.sqhk.co/xovatapegil/c3zjdiv/tevulirejidugapomifimida.pdfIn PDF document text
    • https://cdn.sqhk.co/baxorurifina/eOgeicJ/34311596118.pdfIn PDF document text
    • https://cdn.sqhk.co/nivunufozub/jgfibVt/19131919168.pdfIn PDF document text
    • https://cdn.sqhk.co/memenewo/chfoijv/zombie_survival_wasteland_mod_apk_unlimited_money.pdfIn PDF document text
    • https://medefidonirefej.weebly.com/uploads/1/3/5/3/135324812/9787667.pdfIn PDF document text
    • https://cdn.sqhk.co/jimavidozeze/iejiLie/34600352760.pdfIn PDF document text
    • https://cdn.sqhk.co/kajutizikodu/gghcTxF/juzezotuxe.pdfIn PDF document text
    • https://zefimaral.weebly.com/uploads/1/3/0/7/130776827/danawesovedugan-xuwego-xulome-kobaperuzikubav.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxunoromi/m6rhfhb/33985795271.pdfIn PDF document text
    • https://zosujugopaw.weebly.com/uploads/1/3/4/5/134509911/583ae3758c43f.pdfIn PDF document text
    • https://cdn.sqhk.co/baxoruIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/77815a0a-a468-46ec-835a-a01dc8affd12/43314227314.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ccc78bf-3bc4-468c-b70f-8b8223a669d2/whats_the_difference_between_s_curl_texturizer_and_comb_thru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f4a124a-6302-4160-980e-df6fcead1782/kaduxax.pdfIn macro / runtime command snippet
    • https://uploads.strikinglycdn.com/files/fe6ca233-7524-412c-bffe-48856435f324/vw_transmission_fluid_fill_tool.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2db6e940-e018-403c-a8ca-6b718b7b9a18/34798961898.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e0b01cb-9c57-40ba-9f52-06511f674c27/71864318459.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b9c60f4-a5e6-4e8b-8089-1e7c497edad0/how_to_subconscious_mind_control.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62ee282a-889b-468d-86e2-65df12443c0c/tesexebepow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5e24564-bdb0-4a4e-baa1-8339432b2e34/timecutter_ss5000_parts_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d336e33-f81e-4838-af46-a3db2992291a/how_to_repair_pallet_jack_handle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c55f964-0784-4d9f-83f8-74dca08e2bef/litivewenomobojinegur.pdfIn 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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13540 5568 bytes
SHA-256: 9b1a7025fb7aa02c049d65ed8e165608321d24c2bd239e3eeab574780ec79936
font_01_sfnt_off0001483c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1483C 4568 bytes
SHA-256: 6c0b0c4db7fdea225b4259526d22f101043b114da7641f70720005e94d7445cc
font_02_sfnt_off000156eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156EB 11592 bytes
SHA-256: 1c79f698f88db9baff7a12790672e61ce662323be757df64480e4901f66dfb99

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