Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9c466a1f876d592…

MALICIOUS

PDF

75.8 KB Created: 2021-03-04 05:04:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 067624a0675552e9f7a7da6d8d4f4952 SHA-1: 1d843b815dd0b23910cc112abe19753e12dbe411 SHA-256: f9c466a1f876d5927bd4dc17ac3ada0aa9a88c8375b6dab63ce9c5883556d056
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'fokemale.ru', which is likely used to host a phishing page or download a secondary payload. The document body, though heavily obfuscated, suggests a lure related to interview questions, a common tactic for social engineering.

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://fokemale.ru/wix?keyword=topgrading+interview+questions+and+answers PDF link annotation
    • http://fejekadiwoxobiz.getenjoyment.net/dlink_dir_601_manual.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476142/normal_5ff9f8ad64cd3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406785/normal_6002b123042d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421983/normal_5fe005d579836.pdfIn PDF document text
    • https://cdn.sqhk.co/sepagumal/heGhhid/avatar_maker_witches.pdfIn PDF document text
    • https://cdn.sqhk.co/rorazelesu/djhWLCA/fiwuvujeje.pdfIn PDF document text
    • http://nuloriwilorij.scienceontheweb.net/zokipivoguxef.pdfIn PDF document text
    • https://cdn.sqhk.co/vujenibolo/En3pjcY/yandex_browser_download_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388271/normal_5ff201b7f2ef5.pdfIn PDF document text
    • http://budivev.scienceontheweb.net/dufesabulorud.pdfIn PDF document text
    • http://sosogemizibu.mypressonline.com/jefeduxagodazewaka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481068/normal_6018cf8913db2.pdfIn PDF document text
    • http://vozuzutiwajuzip.getenjoyment.net/11329272868.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kakef/gambar_sistem_pencernaan_manusia.pdfIn PDF document text
    • http://sazasewugekupej.onlinewebshop.net/masterbuilt_turkey_fryer_recipe_book.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/62790132260.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/26576438498.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/48353909380.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_off0000ec7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7A 5320 bytes
SHA-256: b865b9540916543e61d8629d8fa7ff746df4633eac1aa8ada0e0559841639fa1
font_01_sfnt_off0000feb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB0 10240 bytes
SHA-256: 6b09001ce0b7f2479ba2050c759ce37e0bcceae55cd10e7d31f7f505f893be19

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