Malicious PDF — malware analysis report

Static analysis result for SHA-256 80be62acc362c4d8…

MALICIOUS

PDF

81.6 KB Created: 2021-09-02 01:54:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d33b2be0f1cbb8283238a0030f8a0f07 SHA-1: 8b598ce57f7a9af4c7715d01797055c987e5fff1 SHA-256: 80be62acc362c4d85b9bfa6edbb435f6d2986aa9c41069660c50ca95a922efbd
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. Heuristics indicate it functions as a link farm, with numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The presence of 'utm_term' parameters in some URLs suggests a phishing or scam attempt, likely aiming to lure users with promises of gift cards or similar rewards.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://chameleoncoupons.com/adgprocessing/uploads/files/nelitifa.pdf In PDF document text
    • http://9meclinic.com/ckfinder/userfiles/files/72377842174.pdfIn PDF document text
    • http://ck-kutnahora.cz/gais/image/file/wugituvaguwej.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/5166naiitcf1u3v404hv250u9g/revegexajifimigiw.pdfIn PDF document text
    • http://erex.hu/upload/file/50182839675.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/5olccbbjh3kjs91lpi8q8lepe6/lewugivogapakub.pdfIn PDF document text
    • https://himarco.ir/basefile/himarcoir/files/45051231270.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160881cdb805ec---91254428826.pdfIn PDF document text
    • http://hoteldazegliotorino.com/userfiles/files/94348207829.pdfIn PDF document text
    • http://dc-a0dcf319a153.breakthroughsport.com/userfiles/files/70798245211.pdfIn PDF document text
    • https://chilegastronomia.cl/uploads/userfiles/files/82688230982.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d12d74a384---60293594723.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/2021610143023358.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160936a3596dde---39996307295.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/jj0bkmn95l7auensoh4vbs48uf/86283807835.pdfIn PDF document text
    • http://menloathertonhigh1980.com/clients/6/6f/6f83464fe0b13873896cace574d4baa5/File/mitepinenamarufuduloragi.pdfIn PDF document text
    • http://tochalco.com/uploads/files/bevumadi.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/e7f8ec1777f5a210e626c7d5f540a96a/72533356818.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0465038001623750982.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/qab0q9rtvvsve5bvtvrmt4o6qp/tovinu.pdfIn PDF document text
    • http://pnktools-th.org/ckfinder/userfiles/files/88514200060.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16112df75b2b45---venewivafasipodevolol.pdfIn PDF document text
    • https://pollackmihalyiskola.hu/ckfinder/userfiles/files/pitisa.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/0181a43480f3296d54126237bf9a5c3a/28776089186.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=real+xbox+gift+card+generatorPDF 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_off0000d86a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD86A 10768 bytes
SHA-256: 707a9111de80b5e76d3d17a87a8c8cfb107f0aaa8b534f58f2926a59c080a0da
font_01_sfnt_off0000f121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF121 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10933 18056 bytes
SHA-256: c2e3f0262e4ad485b808d5a8a9483bb17039b0bc5e4414e46c4b892961c8faff

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