Malicious PDF — malware analysis report

Static analysis result for SHA-256 c64650d827bbcee9…

MALICIOUS

PDF

78.1 KB Created: 2021-03-01 02:51:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: f8bc9fdab8245d8433213712c6c5c7be SHA-1: fdb51b660398b72aac53f48d22047efb9654f237 SHA-256: c64650d827bbcee932827e840324934f4f3d7c1afd139c54673427d938a1a665
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 URLs, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to be a lure related to celebrity net worth, directing users to these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/award?keyword=how+much+is+bobbi+kristina+brown+worth PDF link annotation
    • http://jozipuvuwuzaj.mywebcommunity.org/list_of_iso_9001_certified_companies_in_australia.pdfIn PDF document text
    • https://cdn.sqhk.co/joxonorapa/gjihGvl/voziduxelabixuxumixitudu.pdfIn PDF document text
    • https://tuxutumixebapi.weebly.com/uploads/1/3/1/4/131438514/zidik.pdfIn PDF document text
    • https://cdn.sqhk.co/guzupewad/LjAiNji/sprint_spotify_not_working.pdfIn PDF document text
    • https://sozagigojo.weebly.com/uploads/1/3/1/4/131454883/1137956.pdfIn PDF document text
    • https://cdn.sqhk.co/tejosepu/cicjeif/rimivexokanadiki.pdfIn PDF document text
    • http://zefujixa.mywebcommunity.org/navy_seals_dress_uniform.pdfIn PDF document text
    • http://pazadixokumox.sportsontheweb.net/foxit_reader_print_multiples.pdfIn PDF document text
    • http://fawikenaxalu.scienceontheweb.net/troy_bilt_edger_tb554_wont_start.pdfIn PDF document text
    • http://pisodaji.iblogger.org/49047814956.pdfIn PDF document text
    • http://pixunune.sportsontheweb.net/our_god_reigns_chords_key_of_b.pdfIn PDF document text
    • https://sufudoni.weebly.com/uploads/1/3/4/8/134853368/jemelirofugin_kuwusiduzok_kufotigufugi_fijixewukako.pdfIn PDF document text
    • http://gakawisogafuga.mygamesonline.org/savafedemosu.pdfIn PDF document text
    • https://kofutisidizeb.weebly.com/uploads/1/3/1/4/131437743/7625011.pdfIn PDF document text
    • http://nasufulorejuwe.mywebcommunity.org/fl_studio_tutorial_hip_hop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/penale/congruence_triangles_worksheet.pdfIn PDF document text
    • http://lepugip.epizy.com/aha_bls_guidelines_2018.pdfIn PDF document text
    • http://xagadikexebixa.epizy.com/vefunatikonemawi.pdfIn PDF document text
    • http://nimanexobubibub.onlinewebshop.net/what_is_bible_in_arabic.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/7743516031.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_off0000ea26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA26 2988 bytes
SHA-256: f244152f1735ecea2e0015db16f4eec7c19935d3b03785c1fb693a5a6caaf07b
font_01_sfnt_off0000f4d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D6 5264 bytes
SHA-256: 8a71856462ec9722da82e608294854dcc413da8d1ab5ec841b709d5349945e7c
font_02_sfnt_off000106a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A3 10540 bytes
SHA-256: 020bf71d34d8f375a68726e5e40707770d009717901239e2f8fa0d2ef053e93b

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