Malicious PDF — malware analysis report

Static analysis result for SHA-256 32bc2325e9c87caf…

MALICIOUS

PDF

90.6 KB Created: 2021-03-23 14:28:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cde7240d64cad1af3bb8f0f06a7ad17d SHA-1: 81f9e497e40d540d6bbf12fe23646597d8f42f17 SHA-256: 32bc2325e9c87cafcd6ec11fdc06283cba2da375d130eeaf42914183b861a47b
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, with a high-confidence heuristic indicating an advance-fee scam lure. The document body, though heavily obfuscated, contains references to 'biology important questions' and a URL pointing to a domain that appears to be part of the scam. The primary IOC is the external URI found within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bologen.ru/award?keyword=biology+important+questions+for+class+12+cbse+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/punurum/savuvotajokiretomode.pdf
    • https://uploads.strikinglycdn.com/files/749dcc08-8337-4329-ab8d-867718109146/ap_physics_c_mechanics_online_course_free.pdf
    • http://kidojudal.epizy.com/guia_ceneval_enfermeria_2019.pdf
    • https://s3.amazonaws.com/wusigipufuvowix/koruruvabekoke.pdf
    • http://pepebejawu.epizy.com/bujumokar.pdf
    • http://gonoluripep.rf.gd/javascript_tutorial_ebook.pdf
    • https://s3.amazonaws.com/loranoduzuja/17028869945.pdf
    • http://zigubogujivo.epizy.com/captive_minecraft_5.pdf
    • https://s3.amazonaws.com/legipalofi/introductory_econometrics_with_applications_ramanathan.pdf
    • https://s3.amazonaws.com/gofiguj/caligula_overdose_ost.pdf
    • https://s3.amazonaws.com/fukepez/witor.pdf
    • https://s3.amazonaws.com/kegubinefuda/canada_visa_information_vietnam.pdf
    • https://s3.amazonaws.com/zodawanuror/pauletta_platform_bed_by_zipcode_design.pdf
    • https://s3.amazonaws.com/wefemabeni/endnote_citation_not_formatted.pdf
    • https://uploads.strikinglycdn.com/files/018d0375-56d5-4241-9600-350b20cbd622/percy_jackson_titans_curse_graphic_novel_read_online.pdf
    • https://s3.amazonaws.com/domegagowevag/corporation_tax_return_form_2017.pdf
    • http://puzamurepedo.rf.gd/itinerary_format.pdf
    • http://godutiliwaganos.rf.gd/chromedriver._exe_file.pdf
    • https://s3.amazonaws.com/votawawo/guxezo.pdf
    • https://s3.amazonaws.com/bufipevuril/xuvifukufu.pdf
    • http://viputuv.rf.gd/sisexugesujemi.pdf
    • http://misowajonubajoz.epizy.com/kalnirnay_calendar_sep_2020_marathi.pdf
    • https://uploads.strikinglycdn.com/files/fc21a05a-a52a-47f8-b383-57bc42a87dfd/xetijajovujijikovawuj.pdf
    • https://s3.amazonaws.com/nawosineromigi/ponekufeliponijifepudowew.pdf
    • https://uploads.strikinglycdn.com/files/a92df743-d1b6-4d81-abe4-032645292300/1140671571.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff91.bin
ac8f62f86d6904be92e261812783a8d4184c6cea7aa8553c827c41e31c092346		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF91 5960 bytes
font_01_sfnt_off000113c0.bin
9996945d25d3a00fb1dcc198f0e828e503bc1ec25ebbb7df6351af190ada1ec8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113C0 10736 bytes
font_02_sfnt_off0001384d.bin
e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1384D 16164 bytes
font_03_sfnt_off00014d64.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14D64 4324 bytes

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