Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee1d12cbfe0244ef…

MALICIOUS

PDF

77.3 KB Created: 2021-03-09 22:24:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 09c4de2de07727d472a1c193e90caef0 SHA-1: e8df2c45a812b6f276cca70cb4f3f1fbe6120e22 SHA-256: ee1d12cbfe0244ef183b94fcbb845684ff9a6b230f6c638dc907eae6f77fff3f
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm on disposable hosting. The embedded URLs and document body, though obfuscated, suggest a lure related to 'types of dialysis machines pdf' to direct users to potentially malicious sites. No scripts were extracted, but the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://golowaki.ru/award?keyword=types+of+dialysis+machines+pdf PDF link annotation
    • http://ogranicbio.fun/65498276595gfsai.pdfIn PDF document text
    • http://dfwshootersupply.com/272802238862fj5t.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366362/normal_5fc995b841951.pdfIn PDF document text
    • http://my-favshop.online/repazapuduxuwexegizi1sjrv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467278/normal_5fcf0b7d25976.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375073/normal_602b5fc6da027.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465557/normal_5fceb3d3f0eea.pdfIn PDF document text
    • http://bazis-rostov.com/tetesakepomewsm21q.pdfIn PDF document text
    • http://copyrightnotices-form.com/kenmore_electric_oven_not_working_but_stove_top_isefs5r.pdfIn PDF document text
    • http://indonesia2health.online/bundle_class_in_android48434.pdfIn PDF document text
    • http://rubka.space/new_insane_vampire_lord_replacerp284q.pdfIn PDF document text
    • http://help-verifiedbadgecenter.com/lonapojo93sc3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/23224f75-b9f3-4317-b387-c6ebd3991066/tupabunuzotuxadixuxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97368291-98d3-42b6-bd0c-f09cd276ebd7/how_to_program_a_rca_remote_to_a_sanyo_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/ashish_patil_all_songs.pdfIn PDF document text
    • https://8d6920c1-aef5-45ed-b1a0-e693d63948fb.filesusr.com/ugd/0a593f_6949c1a119fa4136a681a94203bd0eb9.pdf?index=trueIn PDF document text
    • https://121f8fc1-d270-4171-a721-8ccd656fc20f.filesusr.com/ugd/2ca22b_2db20da9aa9445ae879800b2c54e149e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bf85715-69e5-49cd-a296-d9cd3f8b3e97/navy_evaluation_and_fitrep_writing_guide.pdfIn PDF document text
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_450a89708cf5400ea4b45cbb7ba4b97c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/166db4e1-6f7e-412e-b8ec-10ae8be0411b/60725672933.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9e57ed0-6a9f-4c25-a8aa-8c65e07739a1/faxos.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/31165109809.pdfIn PDF document text
    • https://s3.amazonaws.com/taguxif/role_of_literature_review_in_research_report.pdfIn PDF document text
    • https://c22e5cf4-338a-4003-9cad-c1cb0be29285.filesusr.com/ugd/3db607_e30895847c3141fe8cf91d84df19ab9e.pdf?index=trueIn PDF document text
    • https://4ad55601-b8ab-4ae0-bc0e-e90069072326.filesusr.com/ugd/3aca14_4e47a0916a4949d3ac71ea81aa886d0b.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_off0000f222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF222 5352 bytes
SHA-256: bb236ee56aea1e915ebdce85f516c4da0b83ee24517d82ff7d60e7cc7ed648e1
font_01_sfnt_off00010440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10440 10308 bytes
SHA-256: 431ab03b949f6b60b8374400897f2e62b614a4fbd94fb2b3366f6b0bb1850ea3