Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ba0781011d608b6…

MALICIOUS

PDF

85.7 KB Created: 2021-03-08 22:54:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 27cd12c2798395f3043fb4e16e87310f SHA-1: 59e53e5b39f6b8e748c288309f16e43264ebd33e SHA-256: 4ba0781011d608b65f4b9a74d0f3326b2ebf5e46510dc6596a62663f31893de2
194 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jumiwimov.ru/wix?keyword=kallimni+arabi+bishweesh+pdf+free+download PDF link annotation
    • https://cdn.sqhk.co/satidaruxami/4snjjzv/jesunijadiduwin.pdfIn PDF document text
    • https://cdn.sqhk.co/laxegipo/q7iheaO/jio_caller_tune_free_app.pdfIn PDF document text
    • https://cdn.sqhk.co/jekunesoru/hjjr0hg/54612324701.pdfIn PDF document text
    • https://cdn.sqhk.co/misusulebix/jghgjhQ/hidden_object_in_picture_2019_big_fish.pdfIn PDF document text
    • https://cdn.sqhk.co/titukopano/hjgcgfF/download_game_ultimate_car_driving_classics_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/mofinopedas/6ss1Lge/airport_madness_3d_volume_2_apk_full_version.pdfIn PDF document text
    • http://xosijitede.22web.org/nesizukekofu.pdfIn PDF document text
    • https://cdn.sqhk.co/fupokiwil/iSOOi53/top_100_songs_2010_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/finulepaf/eoJ9jhd/bbc_bitesize_non_chronological_reports_ks1.pdfIn PDF document text
    • https://cdn.sqhk.co/tubafejog/fhh3whd/cuphead_bendy_mod_download.pdfIn PDF document text
    • https://cdn.sqhk.co/keximovib/jigiFZd/events_this_weekend_in_michigan.pdfIn PDF document text
    • http://bimufufedo.22web.org/forrest_m_mims_iii_getting_started_in_electronics.pdfIn PDF document text
    • https://cdn.sqhk.co/gufezitaxato/dQfichh/prepper_food_list.pdfIn PDF document text
    • https://cdn.sqhk.co/sesizame/i9wZphe/gotaboxisikuxivu.pdfIn PDF document text
    • https://zivejopoji.weebly.com/uploads/1/3/4/2/134266783/3089727a837e.pdfIn PDF document text
    • https://mafupalitofix.weebly.com/uploads/1/3/4/0/134042392/galatupatiboni_sibudif_tixefitifokek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/51bee4d0-c881-4635-be18-2bd510f4b8f6/36447420831.pdfIn PDF document text
    • http://naxamuj.epizy.com/vovepapapajutagopisoja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccb1384d-9e1b-4cfd-b160-9c27029c08a2/2824419767.pdfIn PDF document text
    • http://gelepovasogadax.epizy.com/cultus_lake_oregon_fishing_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffc812f4-aa32-462f-af74-0148d97f352f/why_wont_my_washer_and_dryer_turn_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95882d8b-756d-4b0b-b2b3-d2a4bf2c2242/luwexibefidejutidina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c644c23b-d62e-4317-8c54-b818993fb39f/black_criminal_defense_attorney_in_houston_tx.pdfIn PDF document text
    • http://dipomik.epizy.com/punize.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000121c4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x121C4 22096 bytes
SHA-256: 0899241b210bd6d905619a6f3da4aa65d1c664c696ec00602aaf13f812e8d73a
font_00_sfnt_off0000eae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE3 5480 bytes
SHA-256: 89fbb9764c66ed450798f3618cf36e03987584ff27ca23c8fd0d6e5722f76aa7
font_01_sfnt_off0000fd6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6D 10784 bytes
SHA-256: 6da69bc34b81b6d0f8dad49d81da2a31edb2ef2382b89bb7f30a909f310ac66d