Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba1c092aa471007a…

MALICIOUS

PDF

89.9 KB Created: 2021-03-15 16:17:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 1d517f47554530811b83e760468e56fd SHA-1: bf7e56b95809ba079ad33e9146d36b964e618fa6 SHA-256: ba1c092aa471007a01eb5934df9cda9e2edd5d39ebb6f6c6dbad555accc82ae1
126 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. The document body contains text related to 'Gta 5 full apk obb', suggesting a lure to trick users into downloading potentially harmful software. The presence of external URIs, including a link farm on disposable hosting, further supports the phishing and malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://druttle.ru/wix?keyword=gta+5+full+apk+obb PDF link annotation
    • http://fepaporipevari.mypressonline.com/disney_fake_book_2nd_edition.pdfIn PDF document text
    • http://openlait.pro/bovuxenatawsiyc.pdfIn PDF document text
    • http://lenugaguv.medianewsonline.com/malenigaketexa.pdfIn PDF document text
    • http://armada.technology/howard_miller_grandfather_clock_movement_replacement1w03w.pdfIn PDF document text
    • http://antonioit.fun/gta_san_andreas_modern_mod_android_downloadoyv5j.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410211/normal_6043427de7e36.pdfIn PDF document text
    • http://tokio-2020.fun/maxwell_leadership_biblexhf8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380700/normal_5fd323fb42f4a.pdfIn PDF document text
    • http://fowirunuwajuk.iblogger.org/sexam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478687/normal_60034773bf6a2.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/bejeseja/91539256714.pdfIn PDF document text
    • https://b56e00ce-d729-42e9-814b-b9a4b194f5ba.filesusr.com/ugd/f6f93f_4dde1ed949964435a91a22b822995afc.pdf?index=trueIn PDF document text
    • http://gesebokumu.epizy.com/walking_program_for_weight_loss.pdfIn PDF document text
    • https://s3.amazonaws.com/dusined/28747305297.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/how_to_open_speed_queen_commercial_washer.pdfIn PDF document text
    • https://s3.amazonaws.com/pekatikisuruki/ejemplos_algoritmos_sencillos_informatica.pdfIn PDF document text
    • https://1dab3517-3db0-43ff-9fd6-b65b51f65b60.filesusr.com/ugd/565485_74617d45145644e8b9c6c046ab221227.pdf?index=trueIn PDF document text
    • http://tajapog.rf.gd/90701627474.pdfIn PDF document text
    • https://30f21d72-2b41-4965-a7bc-2abb02bf1ded.filesusr.com/ugd/47e66e_c91933b615a244f59ed0459d0d78d10e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/takateg/kiwizin.pdfIn PDF document text
    • http://gavazawedego.epizy.com/35472392458.pdfIn PDF document text
    • http://jisunopesaluzi.atwebpages.com/52189041816.pdfIn PDF document text
    • http://pufaperimixalet.epizy.com/comparison_exercises.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7B 4980 bytes
SHA-256: 92d3a4953165768579568d973e38578ba8b85f3c013d838728b6e25f1fe283da
font_01_sfnt_off00010e8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E8B 21544 bytes
SHA-256: 09edfc3d8b50556a2b9c1db47d0aecc3eb86c0611ade67ddeaf7248c712491f7
font_02_sfnt_off00013f1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F1D 17916 bytes
SHA-256: 0af3e9459199b7cd9da07d4a93c6a204563e499239180b2f8b3730053c396d57

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