Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d306999c3c1ba85…

MALICIOUS

PDF

73.9 KB Created: 2021-04-02 00:32:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a12cd9908ca22f7e2541fb25c626a36a SHA-1: 83c0f118755168a760e1a24db4b23c17492229c3 SHA-256: 8d306999c3c1ba85bf165cd6d43d3c20ea4e41b975a72d95f0052fcb80b03c73
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains embedded URLs and heuristics indicate it is a link farm designed to redirect users to potentially malicious content, specifically related to 'clash of clans cheats and tricks'. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to trick users into downloading further malware. No scripts were extracted, but the PDF structure and URLs point to a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://kuzutuzo.ru/wix?keyword=clash+of+clans+cheats+and+tricks PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366665/normal_5fe41496bba73.pdfIn PDF document text
    • http://znalomstvavip.site/4641700493nlv4x.pdfIn PDF document text
    • https://ziluxokoker.weebly.com/uploads/1/3/4/3/134392919/f6f30a.pdfIn PDF document text
    • https://jipubegu.weebly.com/uploads/1/3/1/0/131070098/rutuvetilerebek.pdfIn PDF document text
    • https://zuzolavilasobin.weebly.com/uploads/1/3/4/5/134523903/sebedotegap-vegala-dozuxazowevito-jikolibufalixux.pdfIn PDF document text
    • https://wugoxuvalego.weebly.com/uploads/1/3/4/0/134017666/494211a6125615f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503309/normal_603a98eb8703e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378852/normal_602d303ec4373.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480756/normal_601d0c0ef3be4.pdfIn PDF document text
    • http://gemomubogobupo.22web.org/71744741981.pdfIn PDF document text
    • https://zipawigulugug.weebly.com/uploads/1/3/4/9/134902713/guxasobewukakisovak.pdfIn PDF document text
    • http://dasuwupozu.22web.org/sims_3_showtime_serial_code.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408995/normal_5fdb01f3d8914.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377905/normal_5fe24e4888711.pdfIn PDF document text
    • http://sokolov.fun/avchd_video_converter_for_androidhebrf.pdfIn PDF document text
    • http://supportcopyright.net/8941414100v64xm.pdfIn PDF document text
    • http://mastera-saydinga.ru/2356848666znq1f.pdfIn PDF document text
    • http://halfraire.xyz/can_anyone_use_anointing_oilk2yu1.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/lodazojamuva/windows_10_education_microsoft.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/bday_song_for_sister.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/gawaw.pdfIn PDF document text
    • http://pipejogavumem.epizy.com/glencoe_chemistry_online_textbook.pdfIn PDF document text
    • http://napilidowolaro.rf.gd/4_year_plan_for_high_school_template.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_off0000e418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE418 5080 bytes
SHA-256: 1921382d61a62a7e4830789b478d39a0ca440df964122ef6c12817972121109c
font_01_sfnt_off0000f555.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF555 10920 bytes
SHA-256: 410808dfcfa75e81b806e80bbf6fbaf0f273eeaecef83a5c68898ff2b1f23368

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