Malicious PDF — malware analysis report

Static analysis result for SHA-256 b69d474237a01d0e…

MALICIOUS

PDF

73.3 KB Created: 2021-03-16 20:48:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: f697f98d44b29a9271ea82a6bee9d0c5 SHA-1: 8c0d1e4081fea50decc0a7f07b6144ff79d9bdc3 SHA-256: b69d474237a01d0e1bd69af556acc05fda1d104802ad4b9da5065645ab1f907c
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable hosting, many of which are part of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains keywords related to software downloads, reinforcing the lure.

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://lozipotod.ru/wix?keyword=instagram+followers+apk+download+2017 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4418565/normal_602226e003dcd.pdfIn PDF document text
    • http://arenda-comp.space/fewobija25wn4.pdfIn PDF document text
    • https://cdn.sqhk.co/tovisegag/djhgdig/agar._io_pc_windows_7.pdfIn PDF document text
    • https://cdn.sqhk.co/xenudipu/cUuhvtI/dipifanozivojasen.pdfIn PDF document text
    • https://cdn.sqhk.co/webuzifinuno/hep9lhj/ziwewipirurefasixumepaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473919/normal_604826522537f.pdfIn PDF document text
    • http://wekeb.space/ryobi_2200_watt_inverter_generator_oil_changeg41c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500911/normal_602d6a88d5b9f.pdfIn PDF document text
    • https://cdn.sqhk.co/rerunaropiz/cwuSsjd/crowded_house_albums.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448137/normal_6005e70b9869f.pdfIn PDF document text
    • https://cdn.sqhk.co/jukowejazus/X75hhdr/first_grade_math_worksheets_number_bonds.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410004/normal_601ddf68d9035.pdfIn PDF document text
    • https://cdn.sqhk.co/salavogi/HmwajhT/xekerikesi.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobuwaxegu/gf0XUib/ghazwa_khandaq.pdfIn PDF document text
    • https://cdn.sqhk.co/teposodigar/elihghH/best_prison_escape_movies_on_amazon_prime.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408976/normal_6009d8e3df19b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tolamepaduxeju.rf.gd/mobagafem.pdfIn PDF document text
    • http://tasukifuputuf.epizy.com/a_boy_called_bat_guided_reading_level.pdfIn PDF document text
    • http://pilisabewagedix.epizy.com/manualidades_con_papel_reciclado.pdfIn PDF document text
    • http://dopelafoxumamew.rf.gd/the_bell_jar_sparknotes_chapter_7.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCBF 5860 bytes
SHA-256: c884dfd17799a52cfe36326b4882c64eacdf370061325b2a07d34191ddd09c90
font_01_sfnt_off0000e0c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C1 10028 bytes
SHA-256: cc023d0ed3d5ab7592ee35507882a62b5920abb3b554df7f988a6bb72d516dbf
font_02_sfnt_off00010370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10370 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67

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