Malicious PDF — malware analysis report

Static analysis result for SHA-256 08508fc3fa2b34ac…

MALICIOUS

PDF

80.5 KB Created: 2021-03-14 00:31:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 64e0da9bd038b0f68979454b29af5f01 SHA-1: 58b360ef692e5b298ab7b3a7ce56e23d939708ff SHA-256: 08508fc3fa2b34ac35215ba8877555256594db0cff2bd4f57502ed0bd5f84b47
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, with a primary suspicious URL being https://vilenefex.ru/wix?keyword=cadillac+desert+study+guide. The document body, though heavily obfuscated, suggests a lure related to a 'Cadillac desert study guide', which is likely a pretext to direct users to malicious sites. The presence of many disposable hosting links further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://vilenefex.ru/wix?keyword=cadillac+desert+study+guide PDF link annotation
    • http://zinefikitozozeg.sportsontheweb.net/92840060743.pdfIn PDF document text
    • http://dibiwarisogix.mygamesonline.org/52973663817.pdfIn PDF document text
    • http://vawadofofasip.getenjoyment.net/87746267318.pdfIn PDF document text
    • http://gojevomarokabe.getenjoyment.net/83976867606.pdfIn PDF document text
    • http://rejorevubirobu.sportsontheweb.net/xebomo.pdfIn PDF document text
    • http://didibemez.scienceontheweb.net/1575419323.pdfIn PDF document text
    • http://xidufekaposepun.iblogger.org/katuzepujovuwunidape.pdfIn PDF document text
    • http://konalofasu.mywebcommunity.org/is_kill_the_irishman_based_on_a_true_story.pdfIn PDF document text
    • http://mujododaziwato.scienceontheweb.net/23937682876.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kexeban.rf.gd/ammann_aph_6530.pdfIn PDF document text
    • https://0eaabcdb-938a-45a6-85a3-1a7d796bbcdd.filesusr.com/ugd/8d6d25_f52ed4ab76964f95b6ff15ea634eb23b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/summer_infant_baby_monitor_sound_not_working.pdfIn PDF document text
    • https://71f68c9c-1037-483c-a0ca-f268b7ddd3c8.filesusr.com/ugd/87fdc7_02c1d0b5c35e4747b611b84c544d0c06.pdf?index=trueIn PDF document text
    • http://bexisojulodu.epizy.com/kilefomorazowolukilekotob.pdfIn PDF document text
    • http://xowilewegiwo.myartsonline.com/fulubujidi.pdfIn PDF document text
    • https://9f9bd9fa-00fe-4673-b34e-9a629881f524.filesusr.com/ugd/09273f_9e52e1343b40425080e7e5057ff0ebe3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/48949841980.pdfIn PDF document text
    • http://vomewudige.atwebpages.com/21983223002.pdfIn PDF document text
    • http://jigisasamupor.onlinewebshop.net/kufapudikebimosuwasirag.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/xosezixuge.pdfIn PDF document text
    • http://dijipola.onlinewebshop.net/26576246701.pdfIn PDF document text
    • https://a181bb3e-7445-4f1f-a1cf-b2fe66c13e92.filesusr.com/ugd/91ce54_4acf49640aad457b881aa41be1ade43c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/17726212983.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/wavepugobeg.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_off0000ff64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF64 5112 bytes
SHA-256: 460bd4b85ee3dcdd74254c8aac19546f5b49dbe935b7d26f46791d23c400ad54
font_01_sfnt_off000110da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110DA 10492 bytes
SHA-256: 1eaeb841302abef2528b15f6d9e48b19afee47f95da43cdbc15ff944a019baa0

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