Malicious PDF — malware analysis report

Static analysis result for SHA-256 533df72d77fdf717…

MALICIOUS

PDF

108.9 KB Created: 2021-03-06 04:23:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 41e9ca26e4510c5e85fd7f2028a18e35 SHA-1: f797706940240867f1aed33b3877fd326823609d SHA-256: 533df72d77fdf71714b8b2434aced0b3e38de185f5918815f6c5a7505c4a54d0
134 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, with a primary suspicious URL pointing to 'jumiwimov.ru'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed to host many links on disposable domains, a common tactic for distributing malicious content or conducting phishing campaigns. No scripts were extracted, but the presence of external URIs and the ML/ClamAV detections strongly suggest a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9877

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=bee+movie+discord+copypasta PDF link annotation
    • http://mojadejazisapa.sportsontheweb.net/bosch_colt_router_kit.pdfIn PDF document text
    • http://bisokebe.22web.org/bulgarian_method_powerlifting_template.pdfIn PDF document text
    • http://veruvipavopa.getenjoyment.net/can_you_sue_if_falsely_imprisoned.pdfIn PDF document text
    • http://bebetadiruj.mywebcommunity.org/drum_rudiments_poster.pdfIn PDF document text
    • http://gixipures.sportsontheweb.net/what_are_the_4_books_of_islam.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/natewared/93337679684.pdfIn PDF document text
    • http://risesodasa.epizy.com/35648658518.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac372c28-ec09-437b-bd87-4bc1a72eb44a/23715357744.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/toxoboporudozarovok.pdfIn PDF document text
    • http://lafebevu.rf.gd/against_the_odds_magazine.pdfIn PDF document text
    • https://9cf5cc10-3c2e-4e30-ae6b-73ed7beed88a.filesusr.com/ugd/5c2b46_97135cae03024e18b0c91efe6cdecf0f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/36767809-574d-4c4e-aa37-505cf700eceb/povunitivofudoti.pdfIn PDF document text
    • http://jigosip.epizy.com/bhagavathi_full_movie_free.pdfIn PDF document text
    • https://f05e0dbb-21cf-40ea-8b71-00b8d6f49a3b.filesusr.com/ugd/b09e1d_4f32607723ab4e36a4e5e19d208616ab.pdf?index=trueIn PDF document text
    • http://fusozevukatamir.atwebpages.com/xotic_sp_compressor_manuale_italiano.pdfIn PDF document text
    • http://fogabifotu.rf.gd/the_caged_flower_movie.pdfIn PDF document text
    • http://todonoto.epizy.com/cisco_vpn_ubuntu.pdfIn PDF document text
    • http://baperosuvo.rf.gd/bixalo.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezux/oxford_afrikaans_english_dictionary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25a299a2-933e-49d5-8c27-c4b5cad62504/ingenuity_portable_swing_-_cozy_kingdom_instructions.pdfIn PDF document text
    • http://demaketimazo.rf.gd/the_boy_who_harnessed_the_wind_review_questions.pdfIn PDF document text
    • http://dunevuzubodofot.rf.gd/sosogorofatig.pdfIn PDF document text
    • https://d9226533-59f4-4737-ae77-cfa9cdee5378.filesusr.com/ugd/d7c203_94fbc87819a74aff9593769fc2ef2ece.pdf?index=trueIn PDF document text
    • http://zovixis.epizy.com/83557405602.pdfIn PDF document text
    • https://47c0d0ed-94e3-447f-940a-e265262d053f.filesusr.com/ugd/a43ec6_3eb639551e8f4fe2bd5ba9ebc69c959b.pdf?index=trueIn PDF document text
    • https://357b8bef-7330-4cfe-b31d-389db25c4d5a.filesusr.com/ugd/4c76bf_791532c412ef43528c7c8ec301861b7d.pdf?index=trueIn 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012feb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FEB 6440 bytes
SHA-256: 629123bfde0685c5f69bbdd27ec008bde0224d5c30af1dabb990f6ee33ea778e
font_01_sfnt_off00013fdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FDF 5396 bytes
SHA-256: e36ed84c644cd8353757b6ac6941cbec2c3fb33b1655ac3ce627b099728a999f
font_02_sfnt_off0001522a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1522A 7292 bytes
SHA-256: e9f6528534aac4bee8f5e018f3d250c78219e2c8700cb8a7e5f043f15df86dea
font_03_sfnt_off0001690d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1690D 11232 bytes
SHA-256: f1a8a34e12a7a540000ea6f610a1776dca7b6cb277f4384229d74020178c5d1f
font_04_sfnt_off00018f74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F74 16204 bytes
SHA-256: 514ec34c774379c82780ce3b826aceada3291152a2a4734d997485cf707bbc49

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