Malicious PDF — malware analysis report

Static analysis result for SHA-256 bea3a6b9f3b86447…

MALICIOUS

PDF

82.6 KB Created: 2021-09-02 03:47:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ad277fda040c4d36cddce0642303a96b SHA-1: 6563537e4a59aeaf42ac44cedeb6ba989bad0ea3 SHA-256: bea3a6b9f3b86447e7cfa5cea804c1403c3a01773bcde584d107fb66e6f16116
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to websites hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to lure users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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://music-group-store.com/upload/files/1151339234.pdf In PDF document text
    • http://scholl2021.com/clients/1/19/19bca4f76d5065ca3bffbfc1c67e7925/File/85122594858.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210620071748137.pdfIn PDF document text
    • https://chiataiec.com/userfiles/Proj_Name//files/99553497704.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/puxumejakizimezudaxojoku.pdfIn PDF document text
    • http://engineersclasses4competition.com/files/others/37548454067.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/28704549964.pdfIn PDF document text
    • http://ideatity.com/ckfinder/userfiles/files/48384899149.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/66f2d926f9c4b3f497790b6ceb213495/desofebesexatetigamuteron.pdfIn PDF document text
    • https://nmg.lv/img/uploads/files/guxewipok.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/45f79b0a9709f93a268b6278171f8e77/wozar.pdfIn PDF document text
    • http://jindi2010.com/uploadfile/files/83794084332.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075c80fd1a05---sinifur.pdfIn PDF document text
    • http://brkvinc.com/userfiles/file/20404280529.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608304b2a8d77---76801102993.pdfIn PDF document text
    • http://futurepoolandspa.com/ckfinder/userfiles/files/fezenoxab.pdfIn PDF document text
    • http://kemmurad.com/webroot/img/files/63810878998.pdfIn PDF document text
    • http://grandp.ru/userfiles/file/noporekodumimivawuj.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/12fe7368543d8710443e17b69eb86afd/wuvezejubutivo.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/51676388075.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca1262cb248---kunapofozepebosatural.pdfIn PDF document text
    • http://forumcutuca.com/ckfinder/userfiles/files/55479108366.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/10838941296.pdfIn PDF document text
    • https://workinhotel.com/upload/fckfile/zazumofugaraxatupow.pdfIn PDF document text
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607217f9d0579---gavobisikete.pdfIn PDF document text
    • http://maychamsocda.vn/images/userfiles/file/61146803896.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=ch+digraph+words+and+picturesPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E3 18076 bytes
SHA-256: 2dd54f699542ea9d0cde69637eb3def44f9745260753d17eb0445f0d73d9b6f8
font_02_sfnt_off000122a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122A0 10964 bytes
SHA-256: 2e216f0d33b29bff7ee97d9c3c2c489e1591dca02f702b317a9eec57fb03537d

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