Malicious PDF — malware analysis report

Static analysis result for SHA-256 262c028eff97c948…

MALICIOUS

PDF

77.0 KB Created: 2021-03-08 21:25:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b0e21057b1ff3c94c058df61e2b993ca SHA-1: c3f070f2ba348336f9dae2b3f9e5ec34fe686e6b SHA-256: 262c028eff97c9484d79c1a7b7df7297368663dff97b652c422deea25b5cecc4
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a significant number of external links, many pointing to disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of embedded URLs and the PDF's structure strongly suggest it's used as a lure to drive traffic to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/award?keyword=subacromial+bursitis+pdf PDF link annotation
    • http://zdorovienashevse.xyz/65806542770r6627.pdfIn PDF document text
    • https://murunabijijot.weebly.com/uploads/1/3/5/4/135401069/8327422.pdfIn PDF document text
    • http://ilkertr.shop/ibanez_gsr200b_bassg1ss8.pdfIn PDF document text
    • https://legorigerelok.weebly.com/uploads/1/3/6/0/136056749/derigixaw_kilisifoxok_fotibi_nenanolemaf.pdfIn PDF document text
    • https://cdn.sqhk.co/nupozifulija/djchbPL/neon_pokemon_wallpaper_hd_custom_new_tab.pdfIn PDF document text
    • http://whalesqpa.fun/bed_bug_report_columbus_ohio_hotelshaguj.pdfIn PDF document text
    • https://jiwosanoxonu.weebly.com/uploads/1/3/5/2/135299962/liwizimipus.pdfIn PDF document text
    • https://cdn.sqhk.co/vapezuwe/6NE7hha/29329789942.pdfIn PDF document text
    • https://gaxasexafarud.weebly.com/uploads/1/3/4/5/134590452/a2af4803b3.pdfIn PDF document text
    • https://subilitukufune.weebly.com/uploads/1/3/4/6/134629352/4276bb24e927.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://0dd0cd87-80d3-4eb5-b9c6-73c43c3a6fca.filesusr.com/ugd/f0b6b3_2d39dfa63a2e407684da9cbd8bdaa850.pdf?index=trueIn PDF document text
    • https://99f4a897-b223-4833-863a-50ad465ba5d5.filesusr.com/ugd/8e2371_5c0503d20a2b4d998e936a69ba9875d2.pdf?index=trueIn PDF document text
    • https://af30af13-e0b7-4de0-aca7-7783c01eade2.filesusr.com/ugd/9757e7_3f6a7f818fc34c68960aeef007bfc1e3.pdf?index=trueIn PDF document text
    • https://48b7024d-7414-4593-b44d-ed892b96ad15.filesusr.com/ugd/3e5db3_56bf619308e54503a3e923b39afcfa96.pdf?index=trueIn PDF document text
    • https://69a21580-3c80-4f81-8097-1ec0bc18215d.filesusr.com/ugd/bd7df1_263f1a790d5e46778c6f9a2e97f3f3ef.pdf?index=trueIn PDF document text
    • https://69df74eb-9f83-488d-97bb-abb55063df61.filesusr.com/ugd/f34323_38fd5553288f44c9add78c8dce04a0fb.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FA 5200 bytes
SHA-256: 7937efad23710b295a3cbcef0003fb02d5d9f6504713ddfa18f5df0f48eb13bb
font_01_sfnt_off0000f68f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF68F 10076 bytes
SHA-256: 180ae47db5608fc4449ad4ef68adfc03dff3c843c0003d42c11282a1cdd31c94
font_02_sfnt_off00011907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11907 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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