Malicious PDF — malware analysis report

Static analysis result for SHA-256 110abfeb5838a5f2…

MALICIOUS

PDF

79.2 KB Created: 2021-04-02 20:44:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fffe0514ebf535e58e645041fa85315e SHA-1: 72313b4256636f1f0f29da7c7f309049054bc387 SHA-256: 110abfeb5838a5f200af5e9323ed6965077ecd9590778a3cb16ced934f86a71e
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious URL, and ClamAV detection confirms it is a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to exam answer keys. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/123?utm_term=answer+key+neet+2018+code+ww
    • https://falojaba.weebly.com/uploads/1/3/0/7/130776150/7154651.pdf
    • http://health-top.ru/82115212022hkxs4.pdf
    • http://lixorajepidil.mygamesonline.org/68605806410.pdf
    • http://pojapusevipuzu.mypressonline.com/good_news_bible_catholic.pdf
    • https://xadupokunarufi.weebly.com/uploads/1/3/2/7/132710624/tepev-jipofagemi-wavudojonigavom-kupuxesodile.pdf
    • http://sait-ok.ru/mep_archicad_22mgam9.pdf
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdf
    • http://useplafond.xyz/66835962427b60tz.pdf
    • https://miregunuvarur.weebly.com/uploads/1/3/3/9/133997549/lugavepodunafuwufu.pdf
    • https://sojozukajarab.weebly.com/uploads/1/3/4/2/134265810/4524300.pdf
    • http://kowuterada.mygamesonline.org/77225735180.pdf
    • http://xilexevu.scienceontheweb.net/overview_of_codex_alimentarius_commission.pdf
    • http://fortuneo.biz/what_is_a_multi_stem_treeyyxzj.pdf
    • https://sobemifukoku.weebly.com/uploads/1/3/4/8/134887972/delas.pdf
    • http://italywow.pro/2003_dodge_durango_suspension_lift_kitmq6pp.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/d9819390-b414-443f-a5ed-5279b6b5e0ae/goduwapulepilejozulud.pdf
    • http://dojafeduzig.myartsonline.com/plantar_fasciitis_treatment_heel_pain_relief.pdf
    • https://uploads.strikinglycdn.com/files/3f9dbf5e-9852-4188-876f-3de6133c2d93/how_long_to_cook_gammon_on_george_foreman_grill.pdf
    • https://uploads.strikinglycdn.com/files/a664ed3c-00f7-49a2-b59b-1cd029488fe5/47887858379.pdf
    • https://uploads.strikinglycdn.com/files/d06561de-434d-4e6a-ac0d-7fc27382aed7/zecharia_sitchin_gratis.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea19.bin
48a0befab942d114810bfb4b63d8c08fac7ccab5cf03f15572540f6eb21395ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA19 5200 bytes
font_01_sfnt_off0000fbe9.bin
5b61d5ddb8d21a29dcf9ea21ab1475e4cc0533a25fefeeea0c79492828a091e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE9 11020 bytes
font_02_sfnt_off00012173.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12173 4324 bytes

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