Malicious PDF — malware analysis report

Static analysis result for SHA-256 f808899a467cbef4…

MALICIOUS

PDF

91.2 KB Created: 2021-02-28 00:08:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 63423ac8338089c547791f7869614845 SHA-1: 5e2fb6f51b298d2ff0ab2bb0e5d4f9a50eb22c69 SHA-256: f808899a467cbef4c72452c695b2cc8bbb7bbd909fcd7116f127bc93e7001f03
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a critical heuristic firing for ClamAV detection. It contains an embedded external URI pointing to 'fokemale.ru', which is highly suspicious. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely for phishing or to download further malware. The presence of multiple unknown URLs further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/strik?utm_term=what+was+the+point+of+the+princess+and+the+pea PDF link annotation
    • http://nuloriwilorij.scienceontheweb.net/repeletatemej.pdfIn PDF document text
    • http://tijukilebag.getenjoyment.net/harry_potter_books_in_order_set.pdfIn PDF document text
    • http://talebakela.iblogger.org/29007973316.pdfIn PDF document text
    • http://rolapisi.scienceontheweb.net/magpul_ms3_sling_instructions.pdfIn PDF document text
    • http://kogozinudim.22web.org/botticelli_map_of_hell_hd_image.pdfIn PDF document text
    • http://zatoxuvisovapuf.sportsontheweb.net/how_to_change_nc_license_plate.pdfIn PDF document text
    • http://borejukeluteva.mygamesonline.org/70676687074.pdfIn PDF document text
    • http://lezeninimi.medianewsonline.com/ethical_hacking_training_institute.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pokixovuxik/2006_cbr1000rr_owners_manual.pdfIn PDF document text
    • http://dasobiviwadodaj.atwebpages.com/piwafukex.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/shiv_bhola_bhandari_song_arijit_singh.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/71009698894.pdfIn PDF document text
    • http://wolobugoxew.myartsonline.com/health_economics_definition_example.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/75637580056.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/u._s._infrastructure_report_card.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/obc_caste_certificate_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000114b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B3 5104 bytes
SHA-256: e11079e4147891576fbb6b531a4c3056e781cc837d257426f3c701e8b23e6c5a
font_01_sfnt_off00012617.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12617 14364 bytes
SHA-256: 260dd13e6410973f8d4a43a1beb205ed94f1e206a7f6bd577ea02fef420a760d
font_02_sfnt_off00015102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15102 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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