Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddd0f07da5fe1ba8…

MALICIOUS

PDF

78.3 KB Created: 2021-04-12 21:20:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 36cac4bf2b72097317c4c6cc9bb1bee8 SHA-1: 7849f7054db3269269709e3a400dbf081bbba29d SHA-256: ddd0f07da5fe1ba8aa689de9abba4401c8ac7ad2a7e9e619e0f9c5cbfb490f14
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, appears to be a lure related to building a log splitter, which is likely a pretext for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.
  • 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.
  • 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://gimoguvi.ru/strik?utm_term=how+to+build+a+log+splitter+for+a+skid+steer PDF link annotation
    • http://lalat.space/romeo_and_juliet_1996_soundtrack_volume_2ll00x.pdfIn PDF document text
    • http://usmileofficial.site/rufad4jrwv.pdfIn PDF document text
    • http://milanomoda-italy.site/uc_browser_fast_old_version5l2of.pdfIn PDF document text
    • http://ellmax-site.xyz/after_effects_text_animation_tutorialuw68y.pdfIn PDF document text
    • http://bosemefawixuwov.mypressonline.com/10147092609.pdfIn PDF document text
    • http://help-feedback-amzn8.xyz/pulalepixexizawixosofahft2h.pdfIn PDF document text
    • http://pochta-24.cc/what_does_a_seasonal_retail_sales_associate_dowqkr7.pdfIn PDF document text
    • http://tediwaxivuj.sportsontheweb.net/teberupabaguk.pdfIn PDF document text
    • http://riwopebikiguwa.mywebcommunity.org/gusumonaruvolimixox.pdfIn PDF document text
    • http://xepidenad.scienceontheweb.net/finisiwisitebetuvazavo.pdfIn PDF document text
    • http://rupazaduxil.mywebcommunity.org/fun_multiplication_worksheets_grade_4.pdfIn PDF document text
    • http://fojukivijivik.medianewsonline.com/fish_amino_acid_benefits_for_plants.pdfIn PDF document text
    • http://fuwijumazawad.mywebcommunity.org/calgary_lrt_map.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://1ceef7f3-d523-4f80-a0a4-3aed54d3d17a.filesusr.com/ugd/48841a_cfe09bef37d047eaba613ee7c03ca4d1.pdf?index=trueIn PDF document text
    • https://b56e00ce-d729-42e9-814b-b9a4b194f5ba.filesusr.com/ugd/f6f93f_5257c2daa43043edb71d3a4ce375ed8b.pdf?index=trueIn PDF document text
    • https://907864b8-ab38-4b43-b195-7646ee37c451.filesusr.com/ugd/c4b402_16970b1f8d8f462dbd65713c4dd633e1.pdf?index=trueIn PDF document text
    • https://0ecef3a8-5193-4df1-8dcb-1b7dd0f2be2a.filesusr.com/ugd/e6092c_3b7cf920d6a545f3ae46024eaa4f37a3.pdf?index=trueIn PDF document text
    • https://bed1e925-73f7-457c-87ff-53f226988024.filesusr.com/ugd/d4a8ce_b8bb65aff053403ca9c49a339900833a.pdf?index=trueIn PDF document text
    • https://17673d3b-e5d0-4e0e-8211-f079fadf35f5.filesusr.com/ugd/13ae68_b7b66d5ccd1e49ac8383a227e0e202d0.pdf?index=trueIn PDF document text
    • https://2a984544-7cb8-4a4d-9f60-e686f7994e39.filesusr.com/ugd/1434d3_92f1628b3e0746bc923c5e644ae0ddb6.pdf?index=trueIn PDF document text
    • https://a804c8a8-fdf7-4fba-b19b-c23aecc29597.filesusr.com/ugd/a7074a_0cb89aba49f14e74a596ea09bea6491d.pdf?index=trueIn PDF document text
    • http://matewedidoxeber.onlinewebshop.net/66877855504.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e77c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77C 5240 bytes
SHA-256: f5d829c9745d7b4c6c84df4eb0e7cf5b6e47b71133e050856aea7baeb0079d46
font_01_sfnt_off0000f974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF974 10416 bytes
SHA-256: cedf0ae55c5d6387525aec146ecd9ea79f938f2cbb632d94db8ce94db5b2b717
font_02_sfnt_off00011d31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D31 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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