Malicious PDF — malware analysis report

Static analysis result for SHA-256 26b3e1e0d9bf0a76…

MALICIOUS

PDF

117.6 KB Created: 2021-03-28 12:02:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5faec6a157f5c5a686e430bec30669f5 SHA-1: 205bfcb7cc63cb861c8f28aa09d6b7599b28a9f9 SHA-256: 26b3e1e0d9bf0a76698be3a6ca4adbe700c371f0954854e99dcc6fc7e3fec395
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains embedded URLs pointing to suspicious domains, including one that appears to be a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body, though heavily obfuscated, contains metadata suggesting it's a disguised PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://lozipotod.ru/award?keyword=ateismo+y+agnosticismo+pdf PDF link annotation
    • http://albl.ru/the_giver_final_test_answer_keywrpb8.pdfIn PDF document text
    • http://itravelgr.com/jivinolefelosepegph1z.pdfIn PDF document text
    • http://yachts-4-sale.com/17744649023wqfgh.pdfIn PDF document text
    • http://kudopifupelixi.22web.org/husqvarna_weed_eater_223l_parts_manual.pdfIn PDF document text
    • http://particuliers-societegenerale.xyz/kopplen_z3_case_manual2o46a.pdfIn PDF document text
    • http://lnstagramsupportinfo.com/lowuvetojasu0i7cg.pdfIn PDF document text
    • http://buybritishcat.com/panasonic_nn-sa651s_turn_beep_offfvjfi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ed4d48c2-14ea-47f5-a89a-b82193587323.filesusr.com/ugd/8ce377_194d30f6b83f42acbf76bfe3a04a0b50.pdf?index=trueIn PDF document text
    • http://setiwol.epizy.com/alaipayuthey_pachai_nirame_ringtone_free.pdfIn PDF document text
    • https://29fa80ab-3b21-46a5-a5c9-66d7a3d84e9c.filesusr.com/ugd/eb9fb8_ac77414508a04515ab25a3b93f53101a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/kinds_of_sentences_worksheets_grade_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13ccd1e9-0e78-481a-a8a6-a0fd129ae94f/82847178347.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abce0278-e515-41e9-8b05-c8c3e680a03a/what_is_meant_by_the_social_construction_of_gender.pdfIn PDF document text
    • https://s3.amazonaws.com/zedudo/zezawodiwafaxijavu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/582971a4-139b-4ea0-bed7-2477c63c6c1d/mesesujezuw.pdfIn PDF document text
    • https://8eb0ff2f-1b5f-41fb-a82b-bf279dc7f43e.filesusr.com/ugd/868f76_04c3bf50d4d14ce0b90e3f8f9f3c5cc0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rufonali/buku_politik_etis.pdfIn PDF document text
    • http://rinexijirava.rf.gd/acuerdo_marco_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/64134991688.pdfIn PDF document text
    • http://nebobabag.rf.gd/first_angle_orthographic_projection_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d0d3da9-f869-407a-9319-2827083f0c67/giwebibopa.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_off000187a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x187A6 5436 bytes
SHA-256: 4609a47b5b174111920bcbc838e0834c13de33b35fc67949f5a9d1581a2c9756
font_01_sfnt_off00019a26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19A26 13924 bytes
SHA-256: cfab099fd858942e23c12c63bf9057331c464a793afb00e50fcfa5e50ae0d050

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