Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8d3c10ea9e4ce25…

MALICIOUS

PDF

75.4 KB Created: 2021-03-24 11:36:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: f578d42e28ca334c0b16eab3a6cb874a SHA-1: 7c9fb2364559f0b4a1b93ea78f785621ae3f43db SHA-256: c8d3c10ea9e4ce251c86c7d258d013a21c55034ea1f0b727032bf5db6e40193a
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to 'https://xajibur.ru/strik', which is likely a phishing lure disguised as a search result. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xajibur.ru/strik?utm_term=musical+podcasts+like+36+questions PDF link annotation
    • http://tuxosuzarug.iblogger.org/zelda_ocarina_of_time_n64_emulator_android.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483349/normal_5ff4a1aa9ff5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377674/normal_5fd77a0fb17fb.pdfIn PDF document text
    • http://meine-gebuhrenfrei.com/793654556824qj2p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393016/normal_60580d9e070c7.pdfIn PDF document text
    • http://edevletorg.com/how_to_set_filter_cycle_on_hot_tub91y4g.pdfIn PDF document text
    • http://nakrutkavk.site/3923855987068g8h.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/vawoginele/vozitixotojoxesomato.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/87542519829.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/why_wont_my_kindle_fire_not_turn_on.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/types_of_probability_sampling_techniques.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/xotaziron.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/lukonoremuvebiviz.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/jezujimafowi.pdfIn PDF document text
    • http://waraposid.rf.gd/negenuku.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/campione_light_novel_volume_1.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/full_form_of_pseb.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/80587267618.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/meterpreter_android_screenshot.pdfIn PDF document text
    • http://tofekerotireg.rf.gd/event_attendance_form_template.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/ranenupidoxizukevejijifa.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/word_endnote_citation_format.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_off0000e934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE934 5484 bytes
SHA-256: 9a2c6607739ec6fa86c9d79714cb4d96b9231848f6c9f46eb08d681051e394ab
font_01_sfnt_off0000fbf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF6 10508 bytes
SHA-256: fab0afee4c1ab9c23d0005239d72dc08e9aaa70d149c09f133e78b8d5ed9dee6

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