Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fdd9eb7ab56b59e…

MALICIOUS

PDF

79.3 KB Created: 2021-05-16 17:01:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 150a3f926f52d75957959e1addeac22b SHA-1: a8b65793f3066b192698c575568ec88087979e3e SHA-256: 1fdd9eb7ab56b59e289a8202af7cf0e2748dc2c713d8a2cf0de4289122a78bb8
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 0.9997

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://druttle.ru/strik?utm_term=wahl+lithium+ion+cordless+clipper+review PDF link annotation
    • https://cdn.sqhk.co/busosuwik/OMzKiij/oscar_isaac_dune_beard.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388060/normal_600e29a532ad6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467325/normal_5feb6f5348cbb.pdfIn PDF document text
    • https://cdn.sqhk.co/latosagax/bzfXFic/54536814626.pdfIn PDF document text
    • https://cdn.sqhk.co/pupevadojas/jf0hbDV/piano_melody_letter_notes_fur_elise.pdfIn PDF document text
    • https://cdn.sqhk.co/kufejeni/q6ieFgc/the_tiger_king_netflix_wiki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484359/normal_605c90e2dcc1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424637/normal_6019bd857a5b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367944/normal_60124f3e6cddc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376379/normal_6013efe293c64.pdfIn PDF document text
    • https://cdn.sqhk.co/nimotixalulo/7K7cbgh/virtual_families_3_stomping_ants.pdfIn PDF document text
    • https://cdn.sqhk.co/rosafipex/FhihcFo/79969389175.pdfIn PDF document text
    • https://cdn.sqhk.co/wuladupuzo/xkKmghY/76364929083.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368245/normal_5ff9e5e1a9e5c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6a1e2a5f-c456-4288-b9d5-5378f87870fb.filesusr.com/ugd/076fac_92d22ec155ee47aeb8343da0f539626b.pdf?index=trueIn PDF document text
    • https://25cf7bc6-226b-4013-96fa-c64d334b7dac.filesusr.com/ugd/317e1a_1bf42119f767459a91f53808fa704164.pdf?index=trueIn PDF document text
    • https://4b002d3c-a55f-42ce-816c-238f848e88a9.filesusr.com/ugd/3398cc_8bcf4b60ce0746c9acc4905075161531.pdf?index=trueIn PDF document text
    • https://74a5c9af-61bb-4d76-9351-4d02c0bf652a.filesusr.com/ugd/e33828_1507835fa6c04bf5977078a7f921f4a7.pdf?index=trueIn PDF document text
    • https://6e229dea-1f83-4be8-8cd3-388eabd4f5e3.filesusr.com/ugd/1cfe37_27f05ecf1c374e7581d282dc065165f3.pdf?index=trueIn PDF document text
    • https://b3709dad-42f4-4621-9b7e-74d31ca978cd.filesusr.com/ugd/f91cf1_2683f371afe140748238baa8dd9c82f2.pdf?index=trueIn PDF document text
    • https://a62e46b8-d933-4087-892c-e5439cec6991.filesusr.com/ugd/e9cba9_c0e6c131154c4d649e7289dea86eeb89.pdf?index=trueIn PDF document text
    • https://aa4de0c4-a7fb-47f6-97fe-5721705e71c1.filesusr.com/ugd/824332_d397014d71c7438c9113a54c2e546d99.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_off0000f75a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75A 5476 bytes
SHA-256: e453266b01e6964626af397c4a55b914155b8d542578ab3afd5afa2cf7561dd9
font_01_sfnt_off000109e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E9 11268 bytes
SHA-256: c205c16be81493db6888feebabe837c6205cf70e966687fdd29e5e61349a34f2

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