Malicious PDF — malware analysis report

Static analysis result for SHA-256 dda61802e86a4442…

MALICIOUS

PDF

74.3 KB Created: 2021-03-22 08:05:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0cab285bf234db6535e27d40960ce6b2 SHA-1: 536f5c65e2954d08c34922fd0b401697fa6ca888 SHA-256: dda61802e86a444206d9cb48501ceb7963e39419a51cfd82fb00c1eaca574a10
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 0.9991

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://kuzutuzo.ru/wix?keyword=mercruiser+alpha+one+manual+trim PDF link annotation
    • https://dirifulezidume.weebly.com/uploads/1/3/2/7/132740871/5784466.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451950/normal_6030caddb913f.pdfIn PDF document text
    • https://munibejexa.weebly.com/uploads/1/3/1/4/131414516/5453585.pdfIn PDF document text
    • http://kindraretterath.com/35574894647ki16f.pdfIn PDF document text
    • http://alifan.store/9299878063rj5c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403283/normal_604ccbaf2cc72.pdfIn PDF document text
    • https://voropulunonuz.weebly.com/uploads/1/3/5/3/135316946/f3dea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454429/normal_60128f26c9ecd.pdfIn PDF document text
    • https://binemipo.weebly.com/uploads/1/3/0/8/130874238/d0aa8.pdfIn PDF document text
    • https://ritipovilij.weebly.com/uploads/1/3/4/6/134650849/gogujuxadimoli_tozexil_tirobupur_keremaba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501198/normal_6039d3c52f073.pdfIn PDF document text
    • https://gizibufunete.weebly.com/uploads/1/3/4/4/134492386/jevof.pdfIn PDF document text
    • http://trysoda.club/apsystems_yc1000_datasheetdw5az.pdfIn PDF document text
    • http://idealica-italiaoficial.site/jusudaenqqj.pdfIn PDF document text
    • http://dressnbuy.com/rimuxeduxalowaposis5zvn3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452376/normal_601410d5c2f01.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/a3a6ac8b-b42a-4360-a6f5-4b1c4e354b74/zubetumetizu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af34867e-7560-4ffd-af1a-7bd99f6d284b/97205003282.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/ge_advantium_120_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/xubiv.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/555_timer_circuit_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/69575773513.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bfc50a3-f72a-4461-af0e-ff434b72a171/asus_m2n68-am_plus_vga_drivers_for_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/industrial_revolution_reading_comprehension_worksheet_answers.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_off0000e33e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE33E 5180 bytes
SHA-256: d56130a8ac5752efb0b576a3bf2d69d975ed30d6e35d2152d30aebf2709b4a20
font_01_sfnt_off0000f4ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BA 10932 bytes
SHA-256: 53056b3ebf90fdef463dd4e83459b3e714f185f55210072db52eaf714839f614

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