Malicious PDF — malware analysis report

Static analysis result for SHA-256 766582bb3046a257…

MALICIOUS

PDF

78.3 KB Created: 2021-03-22 02:19:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 2b20eccc83bb59af425fb1be2c783835 SHA-1: acaeda0b6c9dd7df5e5f603b0a0dc4b57a067a46 SHA-256: 766582bb3046a2575138e1e6af9882f518da6c9cbff27437841c230c2db4e5bc
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 it's part of a link farm designed to redirect users to potentially harmful content. The primary malicious URL identified is https://midufefew.ru/strik?utm_term=talk+to+her+screenplay+pdf.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://midufefew.ru/strik?utm_term=talk+to+her+screenplay+pdf PDF link annotation
    • http://esclick.pro/bogamemutosanejakejodirauls1i.pdfIn PDF document text
    • http://genoray.pro/62307061273p5xw8.pdfIn PDF document text
    • https://jugotogosef.weebly.com/uploads/1/3/0/8/130814460/pawete.pdfIn PDF document text
    • https://xatodibe.weebly.com/uploads/1/3/5/9/135966399/govoro.pdfIn PDF document text
    • http://wekeb.space/how_to_colour_hair_at_home_malayalama9la0.pdfIn PDF document text
    • https://lijanitog.weebly.com/uploads/1/3/5/3/135309202/6c01f3.pdfIn PDF document text
    • https://wumupokurura.weebly.com/uploads/1/3/0/7/130776197/wagaxagizof.pdfIn PDF document text
    • http://picply.ru/how_much_is_2013_bmw_328i1r9hp.pdfIn PDF document text
    • https://zoviwifave.weebly.com/uploads/1/3/6/0/136053666/luxedafefani.pdfIn PDF document text
    • http://sale20.site/215289682527f2xn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://436c154b-1c2d-4c60-9768-ed3a268ef5e1.filesusr.com/ugd/e8e253_e07eaf721f514fb5b97dae20f92dc831.pdf?index=trueIn PDF document text
    • https://d670dda7-df53-4ef1-8eda-d3256df28744.filesusr.com/ugd/dbbbec_fd8c42d47b3c4d339443c5fc642c7862.pdf?index=trueIn PDF document text
    • https://8cff94d3-ecab-4ea5-ad27-d3e67d02fd32.filesusr.com/ugd/2813e2_c2faa7342fd949c18c3745a6942d497d.pdf?index=trueIn PDF document text
    • https://8767aa75-4bd5-48c0-94ca-24e983238001.filesusr.com/ugd/debdc1_81e0b3fad39741b5959bf1f902876e1d.pdf?index=trueIn PDF document text
    • https://ec8c99fd-5413-4e38-b6a0-2ccbba71fc6f.filesusr.com/ugd/de02f3_6841a9f709f845289871f2eb36f9e4e0.pdf?index=trueIn PDF document text
    • https://79d86aa2-23c4-4aa0-a0dc-c16ac59ae55d.filesusr.com/ugd/ecb701_bbc306140ed24eb98201fbed87ef025f.pdf?index=trueIn PDF document text
    • https://1c437d0a-cccb-4a8a-93f1-39e0b5126915.filesusr.com/ugd/b91566_a1fb87c4ca6a44879034d0c19d0aa633.pdf?index=trueIn PDF document text
    • http://podemerobetalax.epizy.com/bogan_movie_bgm_ringtones.pdfIn PDF document text
    • http://senoburem.epizy.com/what_to_do_if_apple_keyboard_doesnt_work.pdfIn PDF document text
    • https://d896c2b7-539c-4146-aa8a-b39d26e096d8.filesusr.com/ugd/a98ecc_f7fb218b021a4c3d8e8412f34586335b.pdf?index=trueIn PDF document text
    • https://c0b8f06b-4e98-4d3d-89ef-2f08caba629a.filesusr.com/ugd/0c8cc8_695c6cd8a07c463e9ac0a2534a021566.pdf?index=trueIn PDF document text
    • https://f9fc249e-2e6a-4908-9eb0-88005465a50d.filesusr.com/ugd/2530ee_0d10343c195b4afabc9a026371c27f73.pdf?index=trueIn PDF document text
    • https://c1d61d78-9bae-425c-b347-ee91470fe4f1.filesusr.com/ugd/60933b_5ba1ecec37c04be3a50ef99255e10aca.pdf?index=trueIn PDF document text
    • http://xesijapapun.rf.gd/53358521197.pdfIn PDF document text
    • https://b7af6bb9-01eb-4839-ab56-764651de4344.filesusr.com/ugd/2486b5_78a8712805a04db78321f19ef8191078.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_off0000f34d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34D 5356 bytes
SHA-256: 4ffd51d286b76e7610c6f6dfca622efb456a4723202ecd3505cc9bf9d0dfb3c4
font_01_sfnt_off00010589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10589 11180 bytes
SHA-256: 2d663803c91187edf9ec08728b79a7f7562720c7ff20b259fd9465312ae87ec5

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