Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eb0fa0961f2d314…

MALICIOUS

PDF

123.0 KB Created: 2021-07-31 05:46:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b923546ab8ca8dadf53da15d0eb1c882 SHA-1: 396465fc1473bef309dc661a81d1f4c119944347 SHA-256: 5eb0fa0961f2d314df739596465d012080afcaa0e9bfc7a67d168a44c350d530
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or are part of a link farm strategy. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://airholic.com/UpFiles/WebEditorFiles/file/buzeginapejunefuz.pdf In PDF document text
    • http://onnetsolution.in/userfiles/file/66927755169.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/868c0f9bdc44b9ba56a768d5416e33fb/loruweviwibovogutuje.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7cf6002e69---guxevifurod.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/5647377797.pdfIn PDF document text
    • http://barnesfamilyconnection.com/clients/f/f3/f37d50667a1bb99e511e26172889fab9/File/kugirirotidilinij.pdfIn PDF document text
    • http://ubest.ru/images/file/puwodegusuwetigopexop.pdfIn PDF document text
    • https://vestol.bg/files/file/xisiwabubuvurose.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0ea23cee91---xuxotiwusikagopugebenev.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e6cab31390---24034524519.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/fb5e368f41e0dc51bf53f7370fcdff87/85937821785.pdfIn PDF document text
    • https://kajariaadsevents.com/admin/uploads/file/lomufabaxevej.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/valimizarujip.pdfIn PDF document text
    • http://dlikefulproductions.com/clients/875850/File/85135580352.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/rgj8n68ur8f1i1qkabvcn7gkr7/simoleroreduxusuniz.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/49661f3250891ac7ef2bad690fd714a5/19741337080.pdfIn PDF document text
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/zinewabuzebamowuxisolefaw.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a52fbc10f91---2826078727.pdfIn PDF document text
    • http://xn--j1aai7d.xn--p1ai/userfiles/file/56524864127.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7565e23fac---58764792053.pdfIn PDF document text
    • https://cengilli.com/icerik_images/file/kobasowananin.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083ba9445fbc---13293640806.pdfIn PDF document text
    • https://dolnoslaskialarmsmogowy.pl/imgturysta/files/nizelujujunati.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/vomufivididakofufe.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/v11qee3ugob4jdrh35v1kqcsu0/pivexetenaxi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=best+free+iptv+for+firestick+september+2019PDF link annotation
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000163aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163AA 11144 bytes
SHA-256: f148fba84150b907325645c49850712d366aaaf2a5989dd3244fc919d412a08f
font_01_sfnt_off00017da8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17DA8 17852 bytes
SHA-256: 45f1441dc658098ad5a38f9259a7ae76941bf5e1150e6c10e99bdbea08f32936
font_02_sfnt_off0001ac61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AC61 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001c472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C472 17032 bytes
SHA-256: 9707737c37022d2a55f06bd6881c6435b4f97709dfcc3ed7637382fbdc9f5f8c

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