Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddfb6948a151280a…

MALICIOUS

PDF

73.9 KB Created: 2021-08-16 21:33:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e8a97b6c24ad5ded76ce833f42696917 SHA-1: 91823d81f120b9a835a4980145e0093a956fd74d SHA-256: ddfb6948a151280a6fa2ea48256303c14d6de64e7c4e51785814ea2bcaecc3cf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a link farm pointing to numerous PDF files hosted on various domains, suggesting an attempt to distribute malicious content or phish for information. The presence of embedded URLs and the nature of the heuristics indicate a likely spearphishing attachment used to deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abb805d7178---49878469754.pdf In PDF document text
    • http://ixtvs.de/_upload_bilder/_filemanager/file/40600335133.pdfIn PDF document text
    • http://high-keenltd.com/userfiles/file/vidotekikab.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/60860712366.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/39281047281.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/51hn504sm12ocepocakcihq2nk/nilaxalitumawi.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609757592bfec---totemiruxexodekileku.pdfIn PDF document text
    • http://ecoaga.com/documentos/file/72243869824.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/qu43rrc5dto40i88d380giaih4/82297169886.pdfIn PDF document text
    • https://hophamthaibinh.com/upload/files/90774705064.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/e3fd387b89c7b1a3a076ee291338e561/zezafuvazizudow.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160893fc6a3972---tadigukejeledo.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085685f6511d---pijunagunawodenew.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c31e8e726fc---rovaxibexagederuxevagile.pdfIn PDF document text
    • http://galluccifaibano.com/userfiles/file/32273787283.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dd8bd8cad48---gozuti.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6479fddbdcae046dda469b800b525486/97520761412.pdfIn PDF document text
    • http://somersetcountybar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/33709622958.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5acad994b8---fumabexuxafiximiwe.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/gositakot.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/7arlnp0p83h65clpk36urepq70/96433666835.pdfIn PDF document text
    • https://beaszemin.com/files/pikozudemibipu.pdfIn PDF document text
    • http://thebrownbag.vn/upload/files/niroxikimurula.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf12adea1c9---66164509071.pdfIn PDF document text
    • http://asijskepotraviny.cz/files/file/321370396.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=blockchain+miner+pro+apk+free+downloadPDF 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_off0000be65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE65 16524 bytes
SHA-256: 0c1f750aba3ec2f2488524b371dfe55ccbc5d61836ec3ea6569bded1f19f828b
font_01_sfnt_off0000e92a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92A 10852 bytes
SHA-256: 92290b9641423aba81d45b45dd29239747477f1ac44e6cb40c4d11734ec06fe5
font_02_sfnt_off0001020b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1020B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1