Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac579aff7d91f2a5…

MALICIOUS

PDF

108.3 KB Created: 2021-02-22 12:19:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fc0418144465cf2f8c266ae40340a0ad SHA-1: 1588c164fcfb2d7390acb9d069b24961b2ae10b4 SHA-256: ac579aff7d91f2a5f7c749697805e5fe8e2845a29fcf0bb7ea5c8730a2d52480
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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.
  • 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://bologen.ru/123?utm_term=manual+de+organizaci%25C3%25B3n+y+funciones+de+un+restaurante+pdf PDF link annotation
    • http://moreprodukti.com/joliramefalokogajupiwide6b7.pdfIn PDF document text
    • http://true-board1.club/xobiwutl9vnq.pdfIn PDF document text
    • https://cdn.sqhk.co/pawanipol/jdkejhw/gezubunutidulidopan.pdfIn PDF document text
    • http://vorofagup.22web.org/canada_tourist_visa_application_form_sample.pdfIn PDF document text
    • http://zijimesaxa.iblogger.org/12853862616.pdfIn PDF document text
    • https://dezijetide.weebly.com/uploads/1/3/4/8/134864221/maduvekogewoxa_vojobasiwoja_vazup_gepedel.pdfIn PDF document text
    • https://cdn.sqhk.co/xipepovivik/NLChdjd/sudutivipuvupobapo.pdfIn PDF document text
    • http://ig-mediateam.net/biennial_corporate_report_new_mexicovk3y7.pdfIn PDF document text
    • http://help-lnstagram-verifycopyrgiht.com/analytics_for_instagram4bc6u.pdfIn PDF document text
    • https://punulizi.weebly.com/uploads/1/3/5/9/135957491/2f5d17034c56ae7.pdfIn PDF document text
    • https://cdn.sqhk.co/fugolamudara/Gigjahh/67303574206.pdfIn PDF document text
    • https://cdn.sqhk.co/mareduviger/erdsHif/nitupipofokirofaxima.pdfIn PDF document text
    • https://cdn.sqhk.co/sozodumupof/IggUhg2/17138635992.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.thdl.org/http://www.thdl.org/TibetanIn PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/25287684799.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/43064055434.pdfIn PDF document text
    • http://puwojewemuxa.epizy.com/one_piece_binks_sake_piano_sheet_music.pdfIn PDF document text
    • http://sasomibaben.rf.gd/aloe_blacc_love_is_the_answer_traduo.pdfIn PDF document text
    • https://s3.amazonaws.com/gimisorixosu/86925776888.pdfIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/vovos.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://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlTibetanIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12521 1696 bytes
SHA-256: a63dc7203ceba2031beaf1d50b83973ffdd0483474384fa5780efc3deacec6ca
font_01_sfnt_off00012d4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D4B 5616 bytes
SHA-256: 00f437f4410c24d1fa785047817c5aee092e778f6fd90903cc88de379d284a7b
font_02_sfnt_off00014062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14062 8976 bytes
SHA-256: 043275fd08f61a242a3987e2d5cd46ead7ad3b0856b8812769e4fb4fd1355f22
font_03_sfnt_off00015224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15224 13876 bytes
SHA-256: 9ca88536be300c8c898ceb4ba6d2b1eb38e18303a27a3513fd2b5f07d9619889
font_04_sfnt_off00017e00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E00 20120 bytes
SHA-256: d0309abb3f480480b828fff357457ab1492816c6e7c99d942742ab22a1dcd41f