Malicious PDF — malware analysis report

Static analysis result for SHA-256 866ceca350c989ba…

MALICIOUS

PDF

76.9 KB Created: 2021-04-05 22:27:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8ca871e974ed942c303daacb79f03bb3 SHA-1: daebbd2d6d1af8a9e028de5368c7ecd7fcf84b9d SHA-256: 866ceca350c989ba8def1ab8be4f60385a2174aee3041c80eaa58db3817916e9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://jacksth.ru/123?utm_term=good+good+father+sheet+music+piano+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4502870/normal_5fc8fd2951068.pdfIn PDF document text
    • https://cdn.sqhk.co/tifozeborot/KSja4hj/designer_birthday_cakes_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/libabafo/leeidie/54103903839.pdfIn PDF document text
    • https://cdn.sqhk.co/vitimosugu/hfugchi/fatowakimixedonexow.pdfIn PDF document text
    • https://xanodupujariris.weebly.com/uploads/1/3/0/9/130969381/nuloruxi-tetujumebu-jitubajawujek-vaxozi.pdfIn PDF document text
    • https://cdn.sqhk.co/safajoju/bqzihaj/marketing_manager_job_description_2020.pdfIn PDF document text
    • https://nibawomufexax.weebly.com/uploads/1/3/4/3/134371272/dfab9c3852d23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383467/normal_604d6764c782b.pdfIn PDF document text
    • https://cdn.sqhk.co/jupujezaxa/iasVbja/pipisuposa.pdfIn PDF document text
    • https://mulomaninivoxom.weebly.com/uploads/1/3/1/4/131437045/8492971.pdfIn PDF document text
    • https://kowexemi.weebly.com/uploads/1/3/1/8/131872048/3822516.pdfIn PDF document text
    • https://cdn.sqhk.co/ridasozewe/ihgfrgc/45611668643.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://0503187d-52cd-4237-9521-a3cb9bf551ae.filesusr.com/ugd/5bb01c_304793abfde740959eb5d9b59b39df14.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/71bc5d90-4d72-4d35-b3b1-af4603fc52fb/7186928930.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6187f5f-91f2-46e4-9fc5-467f0b7575f0/what_is_meant_by_dynamic_flexibility.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c00883d7-7ca1-4011-8d8a-9737ccd3cd41/the_paradox_of_choice_book_review.pdfIn PDF document text
    • https://76df98a8-3e94-4eee-a6f5-23e1de06049b.filesusr.com/ugd/54c74c_016a6f83fe3540dab9f1c8eae92d5014.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/629f8539-2c2f-49f9-9d48-84da993fa4e4/34471629427.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_off0000e159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE159 5448 bytes
SHA-256: 18234e3bce519289d2dbc3bbf5e28d2b08637d476367710f5c6d128e8d88053a
font_01_sfnt_off0000f3cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CF 10668 bytes
SHA-256: 5a71f7307b9ad83cfdf7630ec9a204811fde8ff27e36d30e6e87695000ee7dc6
font_02_sfnt_off00011845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11845 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

Open this report in the interactive analyzer, or submit your own file for analysis.