Malicious PDF — malware analysis report

Static analysis result for SHA-256 2968b34433f41a8a…

MALICIOUS

PDF

70.1 KB Created: 2021-06-18 22:23:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 979bdb353a80133932c1d1c257ee5c10 SHA-1: 189c7574c26745e9807883ae9e5a70ef3389424c SHA-256: 2968b34433f41a8a1073603aeb6e9231038d0ecb7452736e66656f84173c9ca8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. It contains a link farm pointing to numerous external PDF files hosted on compromised CMS uploads and disposable domains, suggesting an attempt to distribute malicious content or phish for information. The document body, though partially corrupted, indicates a lure related to customizing a birthday cake.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://abnicum.com/files/file/87733108286.pdf In PDF document text
    • http://shreejians.com/userfiles/file/51802392241.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/1rjs3tqqg73609l7lgug6cphk1/62278138373.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/37876c3be39e7ca90247d4eacf11f2d6/nilajubuvofasamoko.pdfIn PDF document text
    • http://mega-gold.com/userfiles/files/15632827493.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/nosinakididobo.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/78a4a1607b98f7a37c39acee59569ea9/migivigememeropis.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/edff6332172928f1211556cf7a2cf9c0/lepurukuzapobigolujavedo.pdfIn PDF document text
    • http://the-bom.kr/upfile/files/jodixevalozudirej.pdfIn PDF document text
    • https://promtong.com/promtong/temp/file/705348576.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/92042301028.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/27f0677d4b618b1fa143c70d5f6dc5f3/pusetazaliwanemubo.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/87103378095.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609aafc970f13---gotubarutidelopanitubor.pdfIn PDF document text
    • http://flambotour.it/themes/userfiles//files/89282848979.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbc645007b---68445513826.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/1cfb1b482f3dae6e361c0edbbdc5a8d5/gejuxofana.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/aa0f159362acf1894452b8fbaddb5769/5010164220.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=happy+birthday+cake+with+name+and+editPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD618 5460 bytes
SHA-256: 4dc644c8c838ead8c437bd1213c3e9a1adac40413a39520113d9919d13689809
font_01_sfnt_off0000e891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE891 10472 bytes
SHA-256: 16e8594cc953fe0f9354a9223192a1825d82dc0313728127545b8d5e1c854544