Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3a32d0792c9ce70…

MALICIOUS

PDF

81.8 KB Created: 2021-03-26 01:39:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f0cd29d64f5278f7e8d7dc11e2474a3 SHA-1: 36116dc62bbf86b528b24ecccc1cdd2d09a481c3 SHA-256: c3a32d0792c9ce70b99c5d2e5c84cdd6d923eda5613eaba0a3812b5caf71fa77
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, forming a link farm, with the primary URL being `https://lozipotod.ru/wix?keyword=tenderfoot+requirements+2019+worksheet`. The document's structure and the presence of numerous links suggest an attempt to direct users to potentially malicious websites, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/wix?keyword=tenderfoot+requirements+2019+worksheet
    • https://static.s123-cdn-static.com/uploads/4374185/normal_5ffe42a43f475.pdf
    • https://cdn.sqhk.co/jevipugirofi/ijbCiea/free_inventory_management_excel_sheet.pdf
    • https://static.s123-cdn-static.com/uploads/4488329/normal_5feb2f29423c5.pdf
    • https://static.s123-cdn-static.com/uploads/4459166/normal_60028e2e90732.pdf
    • https://cdn.sqhk.co/tedefoso/cKjjjhg/pba_pro_bowling_game_nintendo_switch.pdf
    • https://static.s123-cdn-static.com/uploads/4425491/normal_5fecf573cf229.pdf
    • https://static.s123-cdn-static.com/uploads/4446399/normal_5fc811dd5bb45.pdf
    • https://static.s123-cdn-static.com/uploads/4462726/normal_5fdff5b51fe74.pdf
    • http://lowixop.22web.org/technical_analysis_of_the_financial_markets_bahasa_indonesia.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/2489192c-2ea6-470f-8e5f-e161ae850ac4/gazipivukotiniverifema.pdf
    • https://78905da9-dd21-4190-abaa-c894c042e703.filesusr.com/ugd/851c7c_499794cbd586499bbfc65a8817628206.pdf?index=true
    • https://4adff18d-dc39-4349-be2c-eeb12737f1cb.filesusr.com/ugd/9117e0_452febd5f7084f0dbe78250e03868eaa.pdf?index=true
    • https://uploads.strikinglycdn.com/files/64ee4a7b-4633-48ed-8962-c16ceabfe713/vokogulevezodiresujiv.pdf
    • https://76ed6b59-b034-43ac-b949-e1c08f76e3cb.filesusr.com/ugd/ee6100_6e2bf510be0741ebb169876d7566d6e1.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ca5461da-339e-424a-a45b-12ea739e6d37/focusrite_scarlett_18i8_driver_update.pdf
    • https://uploads.strikinglycdn.com/files/2fdc4785-847f-46a3-9373-d5180d8d9329/39684524622.pdf
    • http://jeromipaxipuda.rf.gd/kekatibunotubalosivog.pdf
    • https://uploads.strikinglycdn.com/files/90cefade-58c6-475f-b7f1-398ee95f586c/kodak_easyshare_c813_battery.pdf
    • https://506dbbd1-d4b3-44b1-a4c9-6b5d0cab6a23.filesusr.com/ugd/c75f60_9b1a0b1225f5487eaa151777825da6d7.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3e8.bin
d9b3ef69c579b0a343538dfd06b8d02b3cc026bb9b8818b6978c6d32bf8d7825		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E8 5500 bytes
font_01_sfnt_off00010684.bin
717b5b8cc7ee707d08683728976556e2fe3eb46cb15ccdda07d4203aeff5d032		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10684 10808 bytes
font_02_sfnt_off00012b44.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B44 4324 bytes

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