Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d550bfead904452…

MALICIOUS

PDF

94.9 KB Created: 2021-04-01 20:47:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ebe2392be3240b917ffe6e82382ba0e3 SHA-1: 603e4f8d7993ad1547ba9fcc3121d0dbe31e362c SHA-256: 2d550bfead904452a49712b7c7cb2b129c7c29761e481de0e3693b590cc52c70
104 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous URLs pointing to potentially malicious PDF files, with one URL, 'https://resalured.ru/123?utm_term=aktu+exam+date+sheet+2019+mca', being directly associated with the document's apparent lure of an exam date sheet. The presence of embedded URLs and the ML/ClamAV detections strongly suggest this document is designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/123?utm_term=aktu+exam+date+sheet+2019+mca
    • http://naturaleone.space/angela_davis_an_autobiographyyyo66.pdf
    • https://cdn.sqhk.co/xuzuvazol/gjfjiA1/daxowinusuzedokexulorupif.pdf
    • http://mugedly.xyz/48851938679k31xd.pdf
    • http://dolekil.22web.org/british_columbia_road_map.pdf
    • http://sfr-espace.best/98339905566dnu86.pdf
    • https://cdn.sqhk.co/zogowefu/ngcpTFF/fowevami.pdf
    • http://jadebey-x.com/how_much_is_an_oil_change_for_a_volkswagen_tiguan4ezg5.pdf
    • http://trells.space/44183051209r2xlz.pdf
    • http://koteyarn.moscow/mufaberujipinikiwur11s2.pdf
    • http://vvd.bar/acrobat_reader_programh3vs5.pdf
    • https://cdn.sqhk.co/rotuzuwibi/je9Cgd3/dajibutuxewigutuxuzuj.pdf
    • http://zelopaqq.xyz/how_old_is_daniel_daley4rnfq.pdf
    • https://cdn.sqhk.co/rifusofuwedi/d2hjgez/iihf_power_rankings.pdf
    • http://gmetry.online/pigapadeworokubilzog.pdf
    • http://scotiaenlineape-personas.com/jewanexajafogiwomenexazhn3lk.pdf
    • http://rankingcoach-seo.com/distribucion_normal_estandar_excel_ingles3jyso.pdf
    • http://wavakidagipav.iblogger.org/dowukikivudoxamo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://fedorahosted.org/lohit
    • http://liviwofuxa.epizy.com/53684106512.pdf
    • http://nisifeledarin.epizy.com/xixos.pdf
    • http://munogotisun.epizy.com/bosch_800_series_dishwasher_installation_manual.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f752.bin
85070c011ef3f7ad5372806fbd6e38f4b4c987e631013d8ff022e4569356ba8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF752 5272 bytes
font_01_sfnt_off0001094c.bin
bcbd88a06f053f6080b5c567d8fa27c3795b110fc2f8ccd67affc8c7b4d79255		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1094C 11168 bytes
font_02_sfnt_off00012f9d.bin
2c5f1a2e3d9f683f6a217a47aeaaae813f7d4ef732a5ff54a929695507d09140		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F9D 16092 bytes
font_03_sfnt_off00014463.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14463 4324 bytes
font_04_sfnt_off00015263.bin
5c135f29bc4d2f931eee9ca33e33b9ab7ee8960dc7b552fc9387733c4b093fe1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15263 7784 bytes

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