Malicious PDF — malware analysis report

Static analysis result for SHA-256 798ed49964584c82…

MALICIOUS

PDF

75.4 KB Created: 2021-04-22 22:55:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 459c0554fcfe85539fab3ddc7276a2bf SHA-1: 6298787240abb63869982c58cdf3642212125bb6 SHA-256: 798ed49964584c82bfb885d2392986850c96ab90594e0e52d4f2d3bbd86ac143
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and heuristics indicate it is a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains references to 'Honda civic service code a124' and 'wkhtmltopdf', suggesting a lure for technical information that redirects to a malicious domain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/strik?utm_term=honda+civic+service+code+a124 PDF link annotation
    • http://tiruxuvofov.22web.org/introduction_to_biotechnology_and_genetic_engineering.pdfIn PDF document text
    • http://paksorond.xyz/b_pharmacy_colleges_in_hyderabadty2go.pdfIn PDF document text
    • http://salonapp.xyz/4869733283mk58.pdfIn PDF document text
    • http://catsism.com/detilobamejic59e9.pdfIn PDF document text
    • http://stavki.link/rozigajizamusokuvgqgvk.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/bagokiko/rivasajuvapevazaxeze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ec5ea54-8cf9-4413-bebf-f1fd72af3adb/toyota_corolla_2016_le_oil_filter.pdfIn PDF document text
    • https://ab737b70-891a-4a1f-8db9-ee548211cb31.filesusr.com/ugd/ce14f3_c9495c73761945cca074f6e9a90ea132.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/laginekux/matthew_chapter_17_esv.pdfIn PDF document text
    • https://8df9d1b7-8f6e-49e1-bdac-c9da4d4291fd.filesusr.com/ugd/12c198_c849de9d45024b4cbc7f181fdd7bf474.pdf?index=trueIn PDF document text
    • https://75e6d08a-b14f-4c2c-bd4e-3e6431d9d11c.filesusr.com/ugd/497a87_5d13dd776ce64e97997d9960d94cf6a1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tibitexil/briova_synagis_enrollment_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c2424d9-e9f2-40fe-8308-4ed3bf19b9fb/signs_a_guy_likes_you.pdfIn PDF document text
    • http://fiwemigusa.rf.gd/bald_head_slap_video.pdfIn PDF document text
    • https://s3.amazonaws.com/filidabut/buzakotexupuj.pdfIn PDF document text
    • https://67dec473-0a9c-497c-80b1-62a4c84c5046.filesusr.com/ugd/0aab01_bda0878bdd3a47eb9beae2cc6bc1ca5f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fa98975-78a3-4b42-9e6d-859c2834e4e6/92573495815.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14cc5523-6526-4872-87c6-5f2f50311fd0/gubagusa.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/dj_song_mp4_tinyjuke.pdfIn PDF document text
    • https://a6668164-4238-4e0d-addb-cc4c62f58fca.filesusr.com/ugd/2dfcca_de23e79cea1b493c99066f784586a109.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000debc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEBC 2900 bytes
SHA-256: 68d094faf81d2ea9f62e68ee4e789e40b6192f27e323b9e50c58fbaa8f881837
font_01_sfnt_off0000e8ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FF 5192 bytes
SHA-256: 730154f179098f710d6374b86364e1d16014f9c950cc002571f7150d47bce4cb
font_02_sfnt_off0000fac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC1 10836 bytes
SHA-256: eb9ad41bf68f38b8aff0a40d8864dbee858855b675b59b76da0fa36b5432e98a

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