Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bbbf67e1aa2acc2…

MALICIOUS

PDF

71.2 KB Created: 2021-03-20 07:46:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: d6fa2b1e639c9d402711ed57a7b0049a SHA-1: 82a596bfcf87aa8af3799d4367a8808a0e1fdbd0 SHA-256: 0bbbf67e1aa2acc2e539450576263c22b58f6c0b75e28fc6675c1d6930c6934c
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL pointing to a domain associated with phishing and malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to a quiz, likely to trick users into visiting the malicious URL for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://maypoin.ru/wix?keyword=everfi+module+renting+vs+owning+final+quiz+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4494681/normal_60338dc4332f4.pdfIn PDF document text
    • http://dobofozepop.mygamesonline.org/gumurutixotevufodivew.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366405/normal_5fdd19e67f182.pdfIn PDF document text
    • http://tufezoba.22web.org/63297595439.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473047/normal_602a6ee0ddefd.pdfIn PDF document text
    • http://zumepaposakuf.scienceontheweb.net/15925159226.pdfIn PDF document text
    • http://kobivoweder.mypressonline.com/meal_plan_for_bulking.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449783/normal_5fdce0aabcfd1.pdfIn PDF document text
    • http://tijukilebag.getenjoyment.net/fender_twin_reverb_speaker_wiring_diagram.pdfIn PDF document text
    • http://popisazono.getenjoyment.net/welopunusu.pdfIn PDF document text
    • http://bivozebavi.iblogger.org/semam.pdfIn PDF document text
    • https://giwegedunidex.weebly.com/uploads/1/3/4/7/134701534/miruribipetetaberox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467298/normal_604d12a1d88e9.pdfIn PDF document text
    • https://vuwibisi.weebly.com/uploads/1/3/1/8/131856279/lutagosalubojaxu.pdfIn PDF document text
    • https://bebefezagogu.weebly.com/uploads/1/3/4/3/134372182/kukizituximojisemit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vumafovixono.rf.gd/amcrest_prohd_1080p_wifi_camera_manual.pdfIn PDF document text
    • http://kejarajavamoge.epizy.com/46865629702.pdfIn PDF document text
    • http://bagineju.epizy.com/nulafubepiber.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/mosfet_irf9540_datasheet.pdfIn PDF document text
    • http://raxajabidadida.onlinewebshop.net/arifureta_shokugyou_de_sekai_saikyou_light_novel_volume_10.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/bollywood_movie_posters_hd_free.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/ligoraguvireju.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/us_history_timeline_major_events.pdfIn PDF document text
    • https://s3.amazonaws.com/fonibinaraj/google_translate_camera_app_free.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_off0000d8b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B3 5512 bytes
SHA-256: 1f36175ee243d101f967f31b33e3021cb5035faaeefa0ddba0b3230b99694771
font_01_sfnt_off0000eb77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB77 10376 bytes
SHA-256: 6a077369284516d334617105b6a017476293fc6aceab5958832b5393c1da1551

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