Malicious PDF — malware analysis report

Static analysis result for SHA-256 c200173096acc610…

MALICIOUS

PDF

78.8 KB Created: 2021-04-29 10:34:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 483c6361b8667c001170796ee9b77c98 SHA-1: 5ca476266a019ae6229726f29937624eadfe4dfe SHA-256: c200173096acc610acfbfcc5c1451c6c2e0fbd504b8ff5d81ec60fa58fd07402
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.007 JavaScript

The PDF contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document's content likely prompts the user to install a browser extension or update. While no scripts were explicitly extracted, the presence of embedded URLs and the heuristic firings strongly suggest a social engineering attack aimed at tricking users into downloading malicious content or revealing credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://bologen.ru/strik?utm_term=star+citizen+free+to+play+download PDF link annotation
    • https://vifazadaza.weebly.com/uploads/1/3/4/8/134883600/34d9bd3de48f5.pdfIn PDF document text
    • http://cg-designer.xyz/biremoxipamoripeviz6rz5.pdfIn PDF document text
    • http://gazzsheff.xyz/zogemubovenavapizon087lt.pdfIn PDF document text
    • http://piriketag.22web.org/stock_aging_report_in_sap_b1_query.pdfIn PDF document text
    • https://kexeretuzigu.weebly.com/uploads/1/3/1/6/131637303/0d91ff3e557dfb.pdfIn PDF document text
    • https://tabanaxil.weebly.com/uploads/1/3/1/8/131857193/vazorezoke-fejazalag-tolos-xutafobudipa.pdfIn PDF document text
    • http://amaryllis.space/79559050381p5ajw.pdfIn PDF document text
    • https://lomewulepizava.weebly.com/uploads/1/3/3/9/133999744/fokumilirovedeni.pdfIn PDF document text
    • https://vumopiwerelo.weebly.com/uploads/1/3/4/7/134730258/tizapog_judotu_wilun_fisol.pdfIn PDF document text
    • http://teksalon.xyz/free_printable_categorization_worksheets8sy1z.pdfIn PDF document text
    • https://bupafenanibud.weebly.com/uploads/1/3/4/0/134042845/kokuterogijug.pdfIn PDF document text
    • http://lafarupikawa.22web.org/o_que__anemia_ferropriva.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://36c7e617-1221-4173-b726-d5bce2878801.filesusr.com/ugd/610d21_0f6b10f7f85743e6b787bf331ce76bc1.pdf?index=trueIn PDF document text
    • https://2e81f42f-67f9-46a9-89e2-a5f3ab3b03ee.filesusr.com/ugd/f138f5_9f8d46889e7344b99c2af069ea7bb93b.pdf?index=trueIn PDF document text
    • http://womogesupepup.epizy.com/2018_chevrolet_spark_ls_manual.pdfIn PDF document text
    • https://aa700e4b-9450-4a85-8b7e-8c92ffe47626.filesusr.com/ugd/de972d_a2ca565b49604122b4bf5a7bf058d4e8.pdf?index=trueIn PDF document text
    • http://deburukibovip.rf.gd/jonoli.pdfIn PDF document text
    • https://665985ba-8e9f-4173-b993-17a3090d61d7.filesusr.com/ugd/08421c_0fdadeff2821488a877a68d93afef47d.pdf?index=trueIn PDF document text
    • https://0b21792c-a699-4cf4-8833-5910c6ad58af.filesusr.com/ugd/b0b521_9595fe523c894d3fb08becf8826d9935.pdf?index=trueIn PDF document text
    • https://92e0cadd-ca3c-497d-ba7d-1aece6ee6da0.filesusr.com/ugd/008e52_cfa0a10b32d241e88f4610137178907a.pdf?index=trueIn PDF document text
    • http://kovemipenege.rf.gd/how_much_do_detectives_get_paid_in_new_york.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AF 5320 bytes
SHA-256: 116ae6b2ade58acce7f6156296069ff067a18665788fe67cc4642b9577d209ae
font_01_sfnt_off000108f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F9 10896 bytes
SHA-256: 38f001a65b351763dfbaf5162ee24266cf21e622ccf4acda16214a410681e8f2

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