Malicious PDF — malware analysis report

Static analysis result for SHA-256 857a43644bbaf534…

MALICIOUS

PDF

90.8 KB Created: 2021-03-25 03:33:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f500e77c8a0dbf2814aa628f20126088 SHA-1: baf34c1a1499194a5feffbedc10971bff94ae869 SHA-256: 857a43644bbaf5349f4910167cee7286ce465c1c42ffc858f4da8045e1737df2
104 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. The embedded URL and document body suggest a lure related to game cheats or unlimited resources, likely to trick users into downloading a payload. While no scripts were explicitly extracted, the PDF format and the presence of embedded URLs indicate a potential for malicious JavaScript execution or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/wix?keyword=no+limit+drag+racing+unlimited+money+and+gold
    • http://nepufikusugepa.iblogger.org/zojudesonuj.pdf
    • https://nabozuritofawun.weebly.com/uploads/1/3/1/8/131857241/bd67138b290.pdf
    • https://fogujudusimasob.weebly.com/uploads/1/3/4/7/134713994/609c7a1419d177d.pdf
    • https://batuginuvitewaw.weebly.com/uploads/1/3/4/0/134013132/88f32d.pdf
    • https://vubenazago.weebly.com/uploads/1/3/4/3/134357699/naguvug.pdf
    • http://zirevenezefele.iblogger.org/30067217303.pdf
    • https://cdn.sqhk.co/pafevola/gZhibq8/tear_girl_clothes_apk_download.pdf
    • https://cdn.sqhk.co/sobexofap/hjUe4ij/steel_and_flesh_2_new_lands_mod_apk.pdf
    • https://static.s123-cdn-static.com/uploads/4372361/normal_5fc63befd4074.pdf
    • https://zepazilarewar.weebly.com/uploads/1/3/4/3/134310653/c8b9d953b9.pdf
    • https://cdn-cms.f-static.net/uploads/4403421/normal_602d6df93801a.pdf
    • https://cdn.sqhk.co/vaxofalu/b5qrGgi/funny_meme_getting_nails_done.pdf
    • https://cdn.sqhk.co/dojaxeje/5iffy7r/checklist_manifesto_book_review.pdf
    • https://cdn-cms.f-static.net/uploads/4393511/normal_6045da3096489.pdf
    • https://cdn.sqhk.co/kuwusemob/kijchgo/visolonos.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://xubedoper.epizy.com/28384806575.pdf
    • http://tozurome.epizy.com/17189951193.pdf
    • https://s3.amazonaws.com/widofafane/vetoxojolatapep.pdf
    • http://koxujitedosu.epizy.com/pumevirumufexibokalubane.pdf
    • https://s3.amazonaws.com/zisulamisozoto/37069241498.pdf
    • https://s3.amazonaws.com/luxelula/certificate_of_completion_of_project_template.pdf
    • http://vekibavekuje.epizy.com/arraignment_script_philippines.pdf
    • http://vulamexi.rf.gd/dikibulijogiwosoko.pdf
    • http://kemubozureta.epizy.com/maxobaxefi.pdf
    • http://samesejozigima.rf.gd/labakorerirotelukutalotib.pdf
    • http://kesobiw.rf.gd/45335744830.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe79.bin
21eb6509567c2858af3b09a85061aa6ea1ac7d59c09e5fef39c9cd60e87bc463		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE79 6492 bytes
font_01_sfnt_off00011482.bin
fd05cda870548ae164190ce5e8176866b3fccbd7eb8e3248a45a59026131ae01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11482 5032 bytes
font_02_sfnt_off0001258d.bin
4e504ba0971d2aad10eb26d45f1289892f4f488009da0935b83082e45e759752		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1258D 11376 bytes
font_03_sfnt_off00014c91.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14C91 4324 bytes

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