Malicious PDF — malware analysis report

Static analysis result for SHA-256 9476eeaa400750a2…

MALICIOUS

PDF

88.0 KB Created: 2021-06-06 03:19:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 5d2665e7628d880cf2600151c810c382 SHA-1: 3fae35373c9aa635b0cfc641aa4d2170a1fe9f1b SHA-256: 9476eeaa400750a213aba0c2b4f68e53b3e87712b421e5b6ccbe4de2aaa691a7
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 phishing or trojan threat. It contains numerous embedded URLs, with one prominent URL suggesting a lure for downloading a movie, which is a common tactic for phishing or malware distribution. The presence of multiple disposable hosting links further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://nomylo.ru/pbw?utm_term=baixar+filme+corrente+do+bem+dublado+avi PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4421218/normal_5fed481f646a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483873/normal_6066d861ed34f.pdfIn PDF document text
    • https://didirivex.weebly.com/uploads/1/3/4/2/134265945/bosejugonumobeji.pdfIn PDF document text
    • https://dutumeparozawa.weebly.com/uploads/1/3/1/1/131163590/70bb9eeb93fe1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488817/normal_5fcb6ce098cc7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451737/normal_5ff7575175ab4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377928/normal_606a5649b7c76.pdfIn PDF document text
    • https://konimekinera.weebly.com/uploads/1/3/4/4/134444166/1bf25ee6.pdfIn PDF document text
    • https://jowapiwinutakun.weebly.com/uploads/1/3/4/3/134365581/roretimote_xutivaz_xokemosotis_lepowinekivup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500895/normal_603291edcbbed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379220/normal_5ffd2b2172769.pdfIn PDF document text
    • https://fedubipogumuwu.weebly.com/uploads/1/3/1/3/131379546/ropejokab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407552/normal_60352fc8aadb2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454543/normal_5fff97faacfed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470962/normal_6035de85e131b.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
    • http://xojifot.pbworks.com/f/taylor_fundamentals_of_nursing_9th_edition_ebook.pdfIn PDF document text
    • http://dejulagimu.pbworks.com/w/file/fetch/144565266/wisuwu.pdfIn PDF document text
    • http://fudejob.pbworks.com/w/file/fetch/144517809/39291585952.pdfIn PDF document text
    • http://jifesepapo.pbworks.com/f/sofa_set_chair_cad_block.pdfIn PDF document text
    • http://jebusolole.pbworks.com/f/what_to_say_in_a_graduation_toast.pdfIn PDF document text
    • http://marutipug.pbworks.com/f/thuppakki_full_movie_download_tamilgun.pdfIn PDF document text
    • http://tufukamapaf.pbworks.com/f/hitman_blood_money_for_pc_free.pdfIn PDF document text
    • http://fuxedemama.pbworks.com/f/xodetuxemumekafoneku.pdfIn PDF document text
    • http://zalonuzojeru.pbworks.com/w/file/fetch/144478596/1177223114.pdfIn PDF document text
    • http://midevodimu.pbworks.com/f/39468879384.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_off0000f2e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E2 5188 bytes
SHA-256: d630ca9a380f6befb6c1d247da2c90352803581a54d3666d8e317b8f5bea0565
font_01_sfnt_off0001046e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1046E 13364 bytes
SHA-256: 1af44aa2fc71665e004bf3fd154181b435a3772f736b3aa713afef4f44fd88c8
font_02_sfnt_off00012e10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E10 16096 bytes
SHA-256: 2dff1fc3e5bf1049a512ca2ab3d4448021a5e4676c0c9a63fbc3d390c83797d9
font_03_sfnt_off000142d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142D7 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c