Malicious PDF — malware analysis report

Static analysis result for SHA-256 813b2bac0a35cbb6…

MALICIOUS

PDF

76.5 KB Created: 2021-03-02 18:41:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 4f39de8ceeb17dc10519a1795456ec0d SHA-1: 1fefd750bee8f11ce7a6f39985bf0b543128d253 SHA-256: 813b2bac0a35cbb684978a9dcbedbfa3850fd5f2d0a06a993e45b574e234e259
126 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document body, though heavily obfuscated, contains references to 'launcher mod apk free download' and is associated with numerous URLs, many of which are disposable or hosted on suspicious domains. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further suggests a link farm designed to distribute malware or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://xajibur.ru/wix?keyword=launcher+mod+apk+free+download PDF link annotation
    • http://pixell.store/excel_2016_vba_set_active_worksheetjnagj.pdfIn PDF document text
    • https://cdn.sqhk.co/naludibeg/0hbjcjc/27594760703.pdfIn PDF document text
    • http://repetitor-ru.ru/new_cg_bhakti_song4hl97.pdfIn PDF document text
    • http://miwodenexiz.iblogger.org/bluecoat_academy_walsall_ofsted_report.pdfIn PDF document text
    • http://melukutirigap.22web.org/abit_ip35_pro_audio_driver_windows_7.pdfIn PDF document text
    • http://tosety.xyz/shes_the_man_full_movie_123movies96p2o.pdfIn PDF document text
    • https://cdn.sqhk.co/falupuvevore/h0ZtOeC/heir_of_light_leveling_guide.pdfIn PDF document text
    • http://toluvubub.mygamesonline.org/jotofom.pdfIn PDF document text
    • http://morpeoplelife.ru/the_little_prince_summary_chapter_67jx9x.pdfIn PDF document text
    • http://bibuzikufaje.mygamesonline.org/tactics_by_gregory_koukl_free_download.pdfIn PDF document text
    • http://bitcoinchat.fun/4622859036z23tb.pdfIn PDF document text
    • https://cdn.sqhk.co/pawapoma/BhdjhRm/31582150365.pdfIn PDF document text
    • http://nafarami.medianewsonline.com/food_chain_worksheet_4th_grade.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jenesigafepi.epizy.com/589155767.pdfIn PDF document text
    • http://vemesivudaro.epizy.com/90764689801.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/ludupilekovokuxoto.pdfIn PDF document text
    • http://rovofupokunuda.rf.gd/seminozoboritifutuz.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/fun_android_games_with_friends.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/42964539810.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/syria_chemical_weapons_report.pdfIn PDF document text
    • http://nimanexobubibub.onlinewebshop.net/what_is_bible_in_arabic.pdfIn PDF document text
    • http://fidusigugowubo.epizy.com/altis_life_police_skins.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_off0000efb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB5 5312 bytes
SHA-256: fb6dc19d01a335e8a80e6dd8d03c92f1b117f7792bb88460cbc93c9a792d2282
font_01_sfnt_off000101b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B1 10176 bytes
SHA-256: a8b9ff97e767b863d7aa93897fc1dcd737ba0764a090ff407493dacd1a03be5a

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