Malicious PDF — malware analysis report

Static analysis result for SHA-256 67ab2458f88d0aa4…

MALICIOUS

PDF

81.5 KB Created: 2021-09-02 19:38:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 64cabc38f4eb35d17574655f861d9ea5 SHA-1: 7b5af354e2887a3466b9a0eeb7bebc72407aa3fb SHA-256: 67ab2458f88d0aa4abec0483bb95c36580c829c5c0cb71df6cc4d7d23f9b460d
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites, suggesting it is used to distribute phishing content or further malware. The PDF itself contains obfuscated data rather than readable content, reinforcing its role as a delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://pistant.ru/uplcv?utm_term=concepto+de+elasticidad+en+economia+pdf PDF link annotation
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/a4bcfb130077b6a061e545528905636f/20519777504.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/69142910662.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4c1caddcf9---kesizerer.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/7d22774d34ed23b112186c168c7e3063/63295315392.pdfIn PDF document text
    • http://hillcresthigh1971.com/clients/9/9f/9fbf9047a6869172a982db6f42f05a9a/File/xetobu.pdfIn PDF document text
    • http://phanphoiongnhuahoasen.vn/upload/files/7067625911.pdfIn PDF document text
    • http://greenberetrotcmedals.org/clients/e/ee/eef2f5edcbf7b69ea683240098563b39/File/80688217996.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/jmhfeq04sdu6oem2ns2890jiiq/memomovudodawulapitut.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088a926015e1---fuwifasipimaxonaduvoduzew.pdfIn PDF document text
    • http://bjxbw.cn/userfiles/file/xetilasigav.pdfIn PDF document text
    • http://daiduongmetal.com/uploads/ckfinder/files/mewokusutokorebujifuputil.pdfIn PDF document text
    • https://mimpishio2.net/contents//files/vazimowonufe.pdfIn PDF document text
    • https://paidionresearch.com/userfiles/files/fimew.pdfIn PDF document text
    • http://tano-cable.com/d/files/62516463988.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a01bce79b48---67853340933.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/moxibijoratuvaxefurejekus.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160aac7bfb5875---tabiresezi.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/fekafawomukabubarid.pdfIn PDF document text
    • http://fsgpj.com/upfolder/e/files/20210728020513.pdfIn PDF document text
    • http://tkhomedeco.com/assets/uploads/ckedit/files/20210717230103.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/1vbu290kdqvtao672n0kafi0h0/pagilaripelepate.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_off0000d928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD928 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f13f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13F 10712 bytes
SHA-256: fcabdca576e31aa0545ac470eeb5fd499f91001d885bc7a400564808eef5c8f9
font_02_sfnt_off000109d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D6 18304 bytes
SHA-256: 25e1c9aa3e5d3b7c9b28ef29e998dc5ac926bc88f2d013e60864929753bc66da

Open this report in the interactive analyzer, or submit your own file for analysis.