Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc522468faa35ae4…

MALICIOUS

PDF

72.2 KB Created: 2021-09-15 09:17:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 70fe9ab6f356ad6252f2f4f9dbcdafe6 SHA-1: 09d788a9ae1f67030eb614d4e9ba46c6b93dc4b2 SHA-256: cc522468faa35ae4453764c457974932c8c7cefff032a6aa1c7c6dcd828417db
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to compromised WordPress sites and disposable hosting, likely for phishing or malware distribution. The embedded URLs, such as 'https://pixomot.ru/uplcv?utm_term=nova+mod+apk+data', are key indicators of this malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://pixomot.ru/uplcv?utm_term=nova+mod+apk+data PDF link annotation
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/23qljfdqkce5davja3hd4e7qlt/funubaneno.pdfIn PDF document text
    • http://topp.pl/_topp/file/23108007714.pdfIn PDF document text
    • https://wonwon.taipei/photo/file/mazirurulen.pdfIn PDF document text
    • http://newgatedesign.com/Images_upload/files/57567016207.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613252b39dffa---faxurofumizupenetevunaxo.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/57114292639.pdfIn PDF document text
    • http://orvosvalaszto.hu/uploads/files/43959685495.pdfIn PDF document text
    • https://kisikana.hr/UserFiles/files/kabixolegifavagemeze.pdfIn PDF document text
    • http://boonfagrandhome.com/user_img/files/zexokalegijede.pdfIn PDF document text
    • http://distant-property.ru/fck_editor_files/files/6231610337.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/7c0b9ff7ca1f5ade0d7935c0ebdd8b5c/19990181967.pdfIn PDF document text
    • http://drcleancenter.com/uploads/files/202109082248023906.pdfIn PDF document text
    • http://www.deep2001.com/images/library/File/tugususivalefanumorib.pdfIn PDF document text
    • http://pileki.com/imgup/file/gomolofikinar.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16135b9a6753cc---24518621865.pdfIn PDF document text
    • http://yomamasushitogo.com/uploads/files/78487900056.pdfIn PDF document text
    • http://oipipleszno.pl/userfiles/file/fenowujudagilinaruvobepe.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613c1dad0cbb2---momibuvererinu.pdfIn PDF document text
    • http://otworz-biuro-podrozy.pl/userfiles/file/2351915468.pdfIn PDF document text
    • https://vcvscr.cz/www/www/fckphotos/file/wujixekopejowebot.pdfIn PDF document text
    • http://chochosanencino.com/uploads/files/buboliximexumolobetu.pdfIn PDF document text
    • http://playeasypiano.com/resources/fck_images/35773933081.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_off0000bae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAE1 10044 bytes
SHA-256: af75fa531c3118bdfb96249599d82e1690bff6daa683bd00a6277232332be004
font_01_sfnt_off0000d13e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD13E 16652 bytes
SHA-256: 4670db3b32f311579b70d47267de53d7d5e74818b269918038a1c389a54a7157
font_02_sfnt_off0000fbbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1