Malicious PDF — malware analysis report

Static analysis result for SHA-256 bddcdab054f317cc…

MALICIOUS

PDF

94.7 KB Created: 2021-08-14 04:56:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3d89331110b6973710476d02f9cbf95f SHA-1: 3e419eaa8bcb231e607b36b98b10f4cb1a53f43b SHA-256: bddcdab054f317cc2347d76d8180e5be5ecc4cd4a178f1b6e320207f03a0fec4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. It functions as a link farm, with numerous embedded URLs pointing to various websites, some of which are hosted on compromised CMS platforms. The presence of external URIs and link farm heuristics suggests the document's primary purpose is to redirect users to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9867

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://chcial.ru/uplcv?utm_term=yeezy+700+v2+cream+size+guide PDF link annotation
    • http://afghansolar.com/userfiles/file/2427550806.pdfIn PDF document text
    • http://clarksville.net/wysiwygfiles/file/18327629634.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/22f645bf3e0b51d5097d9e35755fec88/dikubapabif.pdfIn PDF document text
    • https://xn--fct8ml6mwue.tw/uploads/files/71784563123.pdfIn PDF document text
    • http://rld-carbon.ru/file/fibadatetanodudinukoki.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/a7fd490fd43b5a7e16ede4d06f707c84/giwavovefotu.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607be87685e6f---68345219358.pdfIn PDF document text
    • http://hyeminshop.com/DATA/files/vimokiporegewunavosil.pdfIn PDF document text
    • http://soepcentrale-dekeyser.be/userfiles/file/93146388409.pdfIn PDF document text
    • http://1parareunion-club.com/clients/4/48/482fc251494624b09083a87f212a12d7/File/xitimus.pdfIn PDF document text
    • http://lurome7071.com/clients/e/ec/ec9741bbacd2a64db66b94b03f3cd24d/File/tisuzi.pdfIn PDF document text
    • http://chinasoftcore.com/userfiles/file///50856002193.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a8c82260e2a---34552838893.pdfIn PDF document text
    • http://mastrodibaglio.it/userfiles/files/37536235196.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb0476e6a2---vijiberosinod.pdfIn PDF document text
    • http://maynenkhiinverter.com/media/ftp/file/73470203053.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/91413981990.pdfIn PDF document text
    • https://datawire.gr/files/files/51362645519.pdfIn PDF document text
    • http://boxshop.mn/userfiles/files/12427496352.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607ebb89c4e87---74363580345.pdfIn PDF document text
    • http://archinfo.ru/uploads/file/741528051.pdfIn PDF document text
    • http://grupophi.es/uploads/files/vowisikuxufaj.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079338f55e39---55766428562.pdfIn PDF document text
    • http://ezibra.pl/upload//file/xexesusoxufuje.pdfIn PDF document text
    • http://tiszaladany.hu/upload/file/44781270090.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/74137771689.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://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_off00010180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10180 21612 bytes
SHA-256: b851950394f6c3bba8d3956dce735bcfbe81a55b330bd6b10579c367696feeab
font_01_sfnt_off00013876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13876 10960 bytes
SHA-256: 75cf34927fb4493b090d22c8c06ac75ab44da33215b6a94c8ac4e663c8bfdcd3
font_02_sfnt_off000151ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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