Malicious PDF — malware analysis report

Static analysis result for SHA-256 46dfb422a2791b4a…

MALICIOUS

PDF

69.8 KB Created: 2021-03-27 19:46:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 653bf15c504ae214ed6d3aaaec74270f SHA-1: a6ef11bd70ad35a089c72bd6792d662f59701a57 SHA-256: 46dfb422a2791b4afeeda1da639beb87edfce048ba7fb2ea70db0355bccfc618
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to trick users into downloading further malicious content. The document body, though heavily obfuscated, suggests a lure related to 'basic electronics mcqs pdf'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://midufefew.ru/award?keyword=basic+electronics+mcqs+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4449009/normal_604fc700f32a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453528/normal_604b34b590838.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376609/normal_603a5d75d0dfc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485176/normal_6049dc418816b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476275/normal_6059e97ab5732.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385413/normal_601cb648aa4eb.pdfIn PDF document text
    • https://cdn.sqhk.co/jimikafede/ggfjhhg/real_city_car_driver_hack_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404308/normal_5fccb2342c5da.pdfIn PDF document text
    • https://cdn.sqhk.co/sezunofubuzi/j6jcDnA/renazusiritiruj.pdfIn PDF document text
    • https://cdn.sqhk.co/mejiwimuza/fmMC3Nx/kowonapebapofaredazoma.pdfIn PDF document text
    • https://cdn.sqhk.co/betewulo/jhif6PD/kobunomipiw.pdfIn PDF document text
    • https://cdn.sqhk.co/nobipajami/jcgdjfZ/mutedawok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493905/normal_6015f3bd8afe2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501484/normal_60499fec16357.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367644/normal_60240f31a7daf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408851/normal_5fd7ca62e34c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456369/normal_5fd3cb03b1de6.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
    • http://bekonoxidolu.rf.gd/economist_april_2020.pdfIn PDF document text
    • http://jijudewaroj.epizy.com/tofukixobegevana.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_off0000c759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC759 5264 bytes
SHA-256: 8815f1fbbffc490ed24af882fbd8aab1c83a826f66e94648dbf5b9ccdd6e152d
font_01_sfnt_off0000d90f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD90F 10256 bytes
SHA-256: aa5c04fc54f6143352490beb48d178733bd62d5f070eb1915217092727eacb5e
font_02_sfnt_off0000fbf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF8 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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