Malicious PDF — malware analysis report

Static analysis result for SHA-256 7585dfe8d56b735d…

MALICIOUS

PDF

79.3 KB Created: 2021-04-05 10:19:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f28f791d753495315b896e884f9d8966 SHA-1: d78b9cd926e2984d90275bd56473fceab8b633cb SHA-256: 7585dfe8d56b735d892205a80a4aaa370cc5dde7afb9529e6a21e4973f08c479
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading malware. ClamAV and ML classifiers strongly indicate maliciousness, consistent with a phishing or trojan delivery attempt. No scripts were extracted, but the presence of external links suggests a social engineering tactic to initiate a download.

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://midufefew.ru/wix?keyword=boosie+we+gone+miss+you+download
    • http://nikaold.site/533151830950tp9y.pdf
    • https://cdn-cms.f-static.net/uploads/4490123/normal_6036550aef66a.pdf
    • http://kudukudimox.sportsontheweb.net/slaves_to_darkness_start_collecting_instructions.pdf
    • http://helps-lnstagramcopyrights-about.com/download_free_comic_books1vi2y.pdf
    • https://cdn-cms.f-static.net/uploads/4373259/normal_6010c60a1fad5.pdf
    • https://pafetuvuwube.weebly.com/uploads/1/3/4/3/134321561/456565.pdf
    • http://idealica-italy.site/would_you_rather_questions_clean_buzzfeedon80i.pdf
    • https://cdn-cms.f-static.net/uploads/4382413/normal_60563cb1bf5aa.pdf
    • https://static.s123-cdn-static.com/uploads/4444622/normal_60099dfee0e1b.pdf
    • https://paxobafu.weebly.com/uploads/1/3/4/6/134697986/filabakuwurebe_xevobif_figuredoto.pdf
    • https://vizepojazitebag.weebly.com/uploads/1/3/4/1/134108988/xulawu.pdf
    • https://pinenovi.weebly.com/uploads/1/3/4/5/134509314/xabutale-folofixoxugapim-pajuvokenaforor-demawofigo.pdf
    • https://cdn-cms.f-static.net/uploads/4445340/normal_604a646c4c1bd.pdf
    • https://dagigokes.weebly.com/uploads/1/3/0/7/130739756/7215714.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kopolug.myartsonline.com/angular_6_interview_questions_and_answers_for_experienced.pdf
    • https://s3.amazonaws.com/rilexazejuzovep/am_fm_shortwave_radio_reviews.pdf
    • https://5a98ae10-8c7e-48da-b83f-9bcbc644cfa3.filesusr.com/ugd/9a8764_77a1d18a23504bfab86bcc559f723553.pdf?index=true
    • https://c72a6d71-2fad-4f5a-8b7a-a7c165485bce.filesusr.com/ugd/a4966f_1036398b21c44f7898b6a7924eb62fea.pdf?index=true
    • https://s3.amazonaws.com/vedexajawo/cobra_29_ltd_classic_delta_tune.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e626.bin
2ce5a7286efefc5aae27ce1c31b3347e159d00bd30cf97f509a0b7f7d49caffb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE626 6440 bytes
font_01_sfnt_off0000f61b.bin
81d2628e2e62841ce1d99236c1f22aca8e1ff2dcafa824815fd7b85ada9247fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF61B 5292 bytes
font_02_sfnt_off00010826.bin
ce78d20baf05ec343450974488d05313837810478e7cae3072bfbe7346615962		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10826 11884 bytes

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