Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb2ce23722745e73…

MALICIOUS

PDF

77.6 KB Created: 2021-04-12 11:15:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06adb5c4939160d217877f335f1a6b6a SHA-1: e9addeebbecf23ebe675804f26577e0684fdc8a2 SHA-256: eb2ce23722745e73c1c52f271da6864f0a3bf0cd7321f17d6498291defbd71ce
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with heuristics indicating the presence of external URIs and embedded URLs. The document body, though heavily obfuscated, suggests a technical context, likely a lure to disguise the malicious intent. The primary attack vector appears to be social engineering via a malicious attachment, leading the user to click on one of the numerous embedded URLs to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crophysi.ru/strik?utm_term=fuzzy+lookup+using+python
    • http://rocketdocs.us/vampire_diaries_books_collectiontufvx.pdf
    • http://natorg.fun/physics_for_global_scientists_and_engineers_volume_2_2nd_editionvxm3f.pdf
    • http://lessonsonline.site/bafebaxefug8rv2g.pdf
    • http://folejaf.mypressonline.com/41572591218.pdf
    • http://fesufobototezer.mywebcommunity.org/namegosukawusulorazel.pdf
    • https://cdn.sqhk.co/sinemajud/hgOhbAj/last_pirate_island_survival_mod_apk_latest_version.pdf
    • http://wogivodugakovek.mygamesonline.org/toloresaroweloromubuxano.pdf
    • http://vudasuti.mygamesonline.org/bass_pod_xt_live_manual.pdf
    • https://cdn.sqhk.co/dumudegurit/c71bIXJ/41471078699.pdf
    • http://reactivascotia2020.com/answer_the_question_and_earn_money_appu130b.pdf
    • https://cdn.sqhk.co/nuxoporerom/gihiKjd/nugivojojewowomaziwuj.pdf
    • http://oyuncuxx.com/how_to_adjust_resistance_on_cycleops_mag_trainer3c7ic.pdf
    • http://malolufixanovas.sportsontheweb.net/cameroon_tribune.pdf
    • http://ketaton.mywebcommunity.org/the_animal_that_therefore_i_am_bea_de_visser.pdf
    • http://moneyindia.site/el_arte_de_la_guerra_sun_tzu_espaol3b2t3.pdf
    • https://cdn.sqhk.co/xaleteser/xffribc/75282111962.pdf
    • http://straponartist.com/is_ti-84_plus_silver_edition_allowed_on_satfa3rx.pdf
    • https://cdn.sqhk.co/letarezetap/qCFbfIF/free_funeral_program_brochure_psd_template.pdf
    • http://erse.xyz/murachs_html5_and_css3_4thmbj3o.pdf
    • https://cdn.sqhk.co/gefeloxo/hiegf0F/88502158165.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efd8.bin
55875cee919949e639c726405445534b939b9cc1f43b58ff165668c960fdb118
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD8 4948 bytes
font_01_sfnt_off000100c9.bin
d933a2771a3309157e1fce13d3186ed1655add2da6150e357d6c10d870e121ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x100C9 11864 bytes