Malicious PDF — malware analysis report

Static analysis result for SHA-256 83215f3790cb638e…

MALICIOUS

PDF

78.2 KB Created: 2021-04-03 17:59:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c204a90a49621092061fb6576f32d1f0 SHA-1: bef2fb48cf81f276e979c1d526e3e522abe7361c SHA-256: 83215f3790cb638ead18a848850e75329ae5df5a25eddbfc724076ec538acefd
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 high likelihood of malicious intent. It contains embedded URLs, one of which, 'https://maypoin.ru/123?utm_term=algebra+ii+notes+pdf', is presented as a lure for 'algebra ii notes pdf'. The presence of embedded URLs and the overall detection suggest the document is designed to trick users into downloading further malicious content, likely through a phishing or social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://maypoin.ru/123?utm_term=algebra+ii+notes+pdf PDF link annotation
    • https://cdn.sqhk.co/putizimetiwe/ibifjdk/hustle_castle_facebook_error.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426262/normal_601f741bd9a08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408343/normal_606142465b19d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423427/normal_6052faf68d2fa.pdfIn PDF document text
    • https://cdn.sqhk.co/dixejetafap/jd6haZC/55382571678.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415051/normal_60610849b38f0.pdfIn PDF document text
    • http://bigops.fun/34050947488cndpl.pdfIn PDF document text
    • http://securityverifiedservices.com/491026947179abdr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474478/normal_6001e2d12c49f.pdfIn PDF document text
    • https://cdn.sqhk.co/pekotegafod/gcigjix/pijevenadijomovedadixis.pdfIn PDF document text
    • https://cdn.sqhk.co/soxemudu/cDiiijf/36825942176.pdfIn PDF document text
    • https://cdn.sqhk.co/xekobigi/xAEJjeV/bird_notification_sound.pdfIn PDF document text
    • https://cdn.sqhk.co/bamosabubesi/hjoAtgh/virus_game_review.pdfIn PDF document text
    • https://cdn.sqhk.co/xejoxoka/mb0hdcv/anki_overdrive_fast_furious_edition_unboxing.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368767/normal_5fe90272830ac.pdfIn PDF document text
    • http://natur-bio.space/is_bose_wave_iv_bluetoothvva8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459625/normal_603a186755120.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477615/normal_5ffdf06c8ad06.pdfIn PDF document text
    • https://cdn.sqhk.co/tegatiwuwax/UL6r4pM/nora_touch_your_feelings_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/14c00064-51f0-49ee-9e85-681c8a5e2706/dell_latitude_e6410_price_in_india_flipkart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5012817f-e199-465d-88b4-023a534f4c6d/panasonic_bq_cc16_indicator_lights_blinking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17ee521a-0ed3-4d09-ad57-67456e84da53/76611468128.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a16e97d-1421-4f92-a5a2-cf509f419596/rozupenobisobegukevadobuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/903c4aa7-8939-4fd8-bc29-162c10c28d96/30205743364.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_off0000f3f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F5 5336 bytes
SHA-256: 4e04c4646ca1b463d005376638c42b2abc1a83ffcbc397871cf8f2fb7018da03
font_01_sfnt_off00010629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10629 11216 bytes
SHA-256: 474df92db085e6153fc166aa51415ec07132d2d2667cb6ed954bff9999c56093

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