Malicious PDF — malware analysis report

Static analysis result for SHA-256 80fc9ba7f4f69ede…

MALICIOUS

PDF

75.1 KB Created: 2021-03-03 19:13:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 0dfb40d7294d0df33218729909e83642 SHA-1: 39fec6199435f3f1a2abae4938a4438873335b68 SHA-256: 80fc9ba7f4f69edeba53309e2dae22f9d74a6b1de8089c666bd76f15544bd01e
126 Risk Score

Malware Insights

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

The PDF file is identified as malicious by ML classifiers and ClamAV, and contains numerous external links, many hosted on disposable domains. One of the primary external URIs, 'https://xajibur.ru/award?keyword=warrior+made+keto+carbs+cookbook+pdf', suggests a lure to disguise the malicious intent. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a likely phishing or redirection attempt to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xajibur.ru/award?keyword=warrior+made+keto+carbs+cookbook+pdf PDF link annotation
    • https://zasubimivari.weebly.com/uploads/1/3/1/3/131383839/nulepaluvil.pdfIn PDF document text
    • http://milanbeachs.space/royal_oak_chocolate_study_deskz7ac7.pdfIn PDF document text
    • http://goproonly.com/12481321029ynvnl.pdfIn PDF document text
    • https://zavuvomexuwu.weebly.com/uploads/1/3/2/7/132740545/267708.pdfIn PDF document text
    • http://verifybadgehelp.com/ideal_gas_law_practice_problems_worksheet_answers7a5eo.pdfIn PDF document text
    • http://reduslim-ufficiale.website/manual_do_drone_e58_em_portugus46mh2.pdfIn PDF document text
    • http://prizinsta24.online/92361578416qq3bz.pdfIn PDF document text
    • http://teksalon.xyz/capitalization_worksheets_4th_grade47re0.pdfIn PDF document text
    • http://new-leggins.site/boston_logan_airport_map7harc.pdfIn PDF document text
    • https://lirebuzufosol.weebly.com/uploads/1/3/1/4/131453665/nileb.pdfIn PDF document text
    • https://joruluzadazalit.weebly.com/uploads/1/3/4/6/134673717/6aa62c02915.pdfIn PDF document text
    • http://webcam-model.online/48729818631xv1ld.pdfIn PDF document text
    • http://good-production9.site/which_chainsaw_brand_is_the_best21n6x.pdfIn PDF document text
    • http://lavkavkusa.store/canon_in_d_tab_guitarr4vg6.pdfIn PDF document text
    • http://bestsaleshopin.xyz/96265569529n2f19.pdfIn PDF document text
    • http://simultaneously.space/old_town_road_ukulele_tutorial99ebk.pdfIn PDF document text
    • https://palisuxil.weebly.com/uploads/1/3/1/0/131071308/bezedilesewumawikoni.pdfIn PDF document text
    • http://capridigi.com/547959646yev6k.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/lezopobigeza/sepsis_guideline_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/battle_for_azeroth_pathfinder_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/acheson_report_public_health.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/wamunadabodosozogo.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_off0000e942.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE942 5488 bytes
SHA-256: 1ea6cfc1db394a579239ef3da1a327d97c84d7851bd9568fefe52d9c2f832669
font_01_sfnt_off0000fbe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE3 10296 bytes
SHA-256: 6ff74427daff07d5db84193a963575800870a3509d46720ce9d7942c6f1e8820

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