Malicious PDF — malware analysis report

Static analysis result for SHA-256 432177f01e12ae6b…

MALICIOUS

PDF

81.3 KB Created: 2021-06-03 03:07:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 11da7b8fdda21199be7b461487994ed5 SHA-1: 568a81c7a7c9d3a4200ccdfaf7853d47a349038b SHA-256: 432177f01e12ae6bdc3274f6798ed2622ef72efb799efd491dc386fcd27c7e2d
194 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://pistant.ru/pbw?utm_term=bombsquad+ultra+mega+mod+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405930/normal_605d6a61efbb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471481/normal_60258da2a8dab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391605/normal_60354d23d97bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418587/normal_5ff20f44e4865.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379046/normal_5fe348d872e82.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468259/normal_5fcff47b3c9eb.pdfIn PDF document text
    • https://defelewag.weebly.com/uploads/1/3/2/7/132741475/3241208.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485162/normal_6044c9df8559d.pdfIn PDF document text
    • https://vedasozeseso.weebly.com/uploads/1/3/4/3/134388395/1878563.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410013/normal_6049660b62d40.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486221/normal_5fc9e7edc7736.pdfIn PDF document text
    • https://redefanugolikiz.weebly.com/uploads/1/3/5/9/135975275/tuzejamitegot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tufukamapaf.pbworks.com/f/19121994720.pdfIn PDF document text
    • http://wejojixi.pbworks.com/f/71361374765.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/598a0b02-fa8c-4e87-bf07-e0b819f41282/82099813535.pdfIn PDF document text
    • http://didaneguk.pbworks.com/w/file/fetch/144427851/fanuc_series_ot_parameter_manual_download.pdfIn PDF document text
    • http://kunixove.pbworks.com/f/83134022178.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/663501bd-bd58-4feb-8ad1-c91f0ac202c8/ulead_video_studio_12_free_download_for_windows_7_64_bit.pdfIn PDF document text
    • http://lekuzax.pbworks.com/f/gattaca_movie_questions_quizlet.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA5 5656 bytes
SHA-256: 1508fdb9368b15b8d26ce02fb60001772be920b47fa9a1f0bcc698dbc1a73b90
font_01_sfnt_off0000fdc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC2 10332 bytes
SHA-256: aa0bc39845c04145398f36e076564c817dbfe4041c268a10006ba399767bf82a
font_02_sfnt_off00012122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12122 16108 bytes
SHA-256: 19922bc2f08fa6ef8c93f450505411267f46fa7325b47d57f86c2b1ed6d61537