Malicious PDF — malware analysis report

Static analysis result for SHA-256 68ff13c0a6733746…

MALICIOUS

PDF

70.7 KB Created: 2021-04-10 22:29:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3dfd9559e946cbe6f4827ada9ea189c3 SHA-1: 91ea8da64a58ae07b80418580e70d1948ca90082 SHA-256: 68ff13c0a67337461754c6006d474188beb48060a3d7454af90b70fcfdda4d80
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/strik?utm_term=macbeth+folger+amazon PDF link annotation
    • http://saniwofixapu.mygamesonline.org/calculus_volume_1_apostol.pdfIn PDF document text
    • http://zefedupawomodos.22web.org/present_perfect_simple_easy_exercises.pdfIn PDF document text
    • https://cdn.sqhk.co/winogolelog/aEFs58W/52515341850.pdfIn PDF document text
    • http://delayikapy.xyz/persepolis_marjane_satrapi_espaol85374.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450632/normal_6032471961226.pdfIn PDF document text
    • https://cdn.sqhk.co/tavedikovo/fgi08Pe/kibakonin.pdfIn PDF document text
    • http://bezprovodov.guru/jibomuzufijoxugepijurengls10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369313/normal_606971db552db.pdfIn PDF document text
    • http://kogejirupu.getenjoyment.net/xobivazewonetosabunur.pdfIn PDF document text
    • http://rewirujekinoxex.iblogger.org/83370399914.pdfIn PDF document text
    • https://cdn.sqhk.co/zezinojox/dbgjibK/mirror_lululemon_commercial.pdfIn PDF document text
    • http://nosezikirem.iblogger.org/43391741112.pdfIn PDF document text
    • https://cdn.sqhk.co/fakujodi/ihhijnA/10344276849.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/a70ac934-9fb7-4dc4-9fed-4753995503c1/who_is_john_maxwell_author.pdfIn PDF document text
    • http://kefixofelapadi.epizy.com/48213533542.pdfIn PDF document text
    • http://rabelame.atwebpages.com/gojoxararukanogejuneli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80941559-89f4-4590-adde-5aa8046077cd/2012_dodge_avenger_tire_size_p225_55r17_se__sxt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/823bb525-74b7-4d08-a971-7bddbd4dd143/ruketuzobuzaxogo.pdfIn PDF document text
    • http://davinawoguzag.atwebpages.com/tratamiento_de_la_balanitis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42b7fe08-fd7f-4fad-8bb8-38bdf75e251e/xitepavaxarow.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB5B 5052 bytes
SHA-256: 69d3a953c2d1150a3ac097688ad22a8a927a3d13c4856edfda714bd77b6bdbd8
font_01_sfnt_off0000dc6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC6F 9908 bytes
SHA-256: e6e2a2af031dbfdf835f6c0c58b9b25fe7cc9896b1ef715b9f0d5db37d80acd3
font_02_sfnt_off0000fdf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF8 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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