Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d1d653cdb1422b1…

MALICIOUS

PDF

73.7 KB Created: 2021-04-03 12:46:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 58fcb7cd664f04e1e1691415dbef787e SHA-1: 5bf8e37aac4ba1b8c8206f884008b63e0fe0f15c SHA-256: 4d1d653cdb1422b152a509b5d4ca622e9c9206dfdd737d80c51e4fa9e15b3b17
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains a reference to 'Bissell big green clean machine not spraying' which appears to be a lure to drive traffic to the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://pelibifir.ru/strik?utm_term=bissell+big+green+clean+machine+not+spraying PDF link annotation
    • https://falojaba.weebly.com/uploads/1/3/0/7/130776150/wowozotozapife.pdfIn PDF document text
    • http://reestr.site/5792701721rwjv8.pdfIn PDF document text
    • http://penaxuwilamufo.iblogger.org/45911117613.pdfIn PDF document text
    • http://felidefewipikig.22web.org/christmas_music_trumpet.pdfIn PDF document text
    • http://azakalaza5.xyz/fesatesedvq33f.pdfIn PDF document text
    • http://bigpleasure.ru/gazoj4uw6i.pdfIn PDF document text
    • https://vekatofe.weebly.com/uploads/1/3/0/7/130775682/c7fbe23fe2c6d31.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://komomikadexep.rf.gd/50299906568.pdfIn PDF document text
    • http://gulopajekojof.epizy.com/lagiwoduvifodoxijodekas.pdfIn PDF document text
    • https://73a1781f-5c9f-4c76-8a11-a8e8c44f336a.filesusr.com/ugd/d9f7b5_1b97f006ef254f4e853a880e3911ba29.pdf?index=trueIn PDF document text
    • https://fc060a1e-8c1d-4b7d-bafd-75f79d4c6355.filesusr.com/ugd/c0a468_bc042f60a67848ebb5829e6ce29652a2.pdf?index=trueIn PDF document text
    • https://c63ca81c-6df4-4ec3-bc2e-8508f29a6879.filesusr.com/ugd/d48fe3_84d64e4c0de94f30aa0da078416d8342.pdf?index=trueIn PDF document text
    • http://xewaxal.epizy.com/multiplayer_chess_app_ios_android.pdfIn PDF document text
    • http://dodupubi.epizy.com/puduvelifolufulafo.pdfIn PDF document text
    • http://miwusox.rf.gd/brothers_2009_film_full_movie.pdfIn PDF document text
    • http://xenadixajasole.rf.gd/iit_b_tech_computer_science_syllabus.pdfIn PDF document text
    • http://dejarovagozude.epizy.com/graphic_design_software_for_windows.pdfIn PDF document text
    • http://tiborumaroxotob.rf.gd/72559175470.pdfIn PDF document text
    • http://bejiteviv.epizy.com/windwalker_monk_artifact_weapon_guide.pdfIn PDF document text
    • https://87164119-88a6-4d6d-a72f-b109cf2d88b9.filesusr.com/ugd/bd0a66_77de1b6a568042fb81c02be0476952ad.pdf?index=trueIn PDF document text
    • http://kadusuru.rf.gd/46893091049.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_off0000e1e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E4 5636 bytes
SHA-256: 7b2a751aee063bce5661e1df97676fba5ea240f7d268e0159584bf4ad879becb
font_01_sfnt_off0000f4ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EE 10776 bytes
SHA-256: 3415784dbf001d221fda9a853a5fb9d8a18e9bc3d6e26d5b22cee5bea4dd59c3

Open this report in the interactive analyzer, or submit your own file for analysis.