Malicious PDF — malware analysis report

Static analysis result for SHA-256 998a2de302cbeaef…

MALICIOUS

PDF

94.7 KB Created: 2021-03-19 07:48:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: afddd108bbda85c4611408cbf8781e10 SHA-1: c4dbafffb2aa44ac69dee77a6e8ba6bf25a7bded SHA-256: 998a2de302cbeaeface9f6e0af7253d6efe1b2c6baaceb564b3baf1a655d1acd
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, with a primary focus on 'maypoin.ru', suggesting a redirection to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a common tactic of luring users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/wix?keyword=mad+max+trophy+guide+and+roadmap PDF link annotation
    • https://vigodabazo.weebly.com/uploads/1/3/4/8/134872933/jinorodifelo-torujut-zovafo.pdfIn PDF document text
    • https://cdn.sqhk.co/ranuvore/hatQhi0/hardiebacker_installation.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411491/normal_5fd8b52dc38b9.pdfIn PDF document text
    • http://vakiduweg.mygamesonline.org/fundamentals_of_communication_systems_global.pdfIn PDF document text
    • http://tiluvopira.medianewsonline.com/jonuvewalopaf.pdfIn PDF document text
    • https://cdn.sqhk.co/munuluxel/qgegiQ8/james_w_nilsson_electric_circuits_solutions_10th_edition.pdfIn PDF document text
    • https://cdn.sqhk.co/manuguwe/dOgeAgj/how_to_paint_pottery_without_a_kiln.pdfIn PDF document text
    • https://cdn.sqhk.co/gogerazina/vsbhbge/bulotavanozutaraxolow.pdfIn PDF document text
    • https://bejobaxugifupe.weebly.com/uploads/1/3/4/6/134628864/mapovul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486353/normal_603d8d8b37161.pdfIn PDF document text
    • http://jetanevuv.iblogger.org/co_marketing_agreement_template.pdfIn PDF document text
    • http://xuwivezotuw.22web.org/ae_9000_user_manual.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://s3.amazonaws.com/safenalavojuwu/nuvubuwekutimixofose.pdfIn PDF document text
    • http://wadobenozunon.rf.gd/audio_vision_video_maker_editor_apk.pdfIn PDF document text
    • http://zepizevut.atwebpages.com/how_long_do_french_students_go_to_school.pdfIn PDF document text
    • http://bupomejov.epizy.com/jobiwavovoguxuzapuli.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/pebaletabavetubosal.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11217 5220 bytes
SHA-256: 421ef57f153041720e663b3c9af97eb14065c29c7f59e49dbe9ff83c503b6a99
font_01_sfnt_off000123c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123C6 11380 bytes
SHA-256: f4a7fd051e33dde761734c2dac2c715be5a8d2e60b2e5ca9608f2399b9356561
font_02_sfnt_off00014a9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A9D 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7
font_03_sfnt_off00015f35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F35 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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