Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e062e47825f8f9a…

MALICIOUS

PDF

108.6 KB Created: 2021-07-03 02:20:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 0d0ceb7335b4b911c8e97845e588f75c SHA-1: d53f44cdb08e1957f60f7d143b8b61c6a270ac62 SHA-256: 7e062e47825f8f9a1597d6f91830eba45bf91fd231de3aa5fb3842d62743d5e0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised WordPress upload storage locations. While no scripts were explicitly extracted, the nature of the link farm and the detection as a trojan suggest it likely attempts to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9792

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://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607128663ecf3---xakebes.pdf In PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be58bd2c30b---38890342847.pdfIn PDF document text
    • https://isleo.com/i_photos/file/28364852407.pdfIn PDF document text
    • https://feniks9.ru/ckfinder/userfiles/files/5882168372.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160835d4424dd4---sajobusadetuf.pdfIn PDF document text
    • https://taiwancy.com/app/webroot/userfiles/files/46726216326.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/gm9q3kqo464jl5mchoh3t2evc2/rebixofudoluluninakopez.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/9648038901a569efcb77010fde27a0f4/merijasukajarul.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16076e0c784e94---83265005899.pdfIn PDF document text
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/9766153768.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16077940fd0426---80426558167.pdfIn PDF document text
    • http://slhs1958.com/clients/18590/File/90184147409.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/tezitogapotar.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-5-15/20210515205205324019.pdfIn PDF document text
    • http://nissanotogovap.com/uploads/images/files/zezolibuxiwatiluxibik.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072cd4617ae4---letolozuliga.pdfIn PDF document text
    • http://www.vnos.vn/app/webroot/uploads/files/tosejagapebiro.pdfIn PDF document text
    • https://arket.io/wp-content/plugins/super-forms/uploads/php/files/gp13ca8bp1kgg6f668ghoeob0r/14494734409.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160bb51f9ba420---12158064385.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/2povfjcopkk3jhir2j59dn3rcr/gufodijidisipinunumokobu.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1606d55c9e67c5---41278943828.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/83967027217.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=define+the+word+catharticPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off00018ae9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x18AE9 16816 bytes
SHA-256: a20acbc26042457854b40beeaddb77726ede2973b02a47879a2dc10d89d789b2
font_00_sfnt_off00011a79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A79 10444 bytes
SHA-256: c26b89e378002b6ed449b044726c4322bb2f0c964ea0516ddba157f95d76ccab
font_01_sfnt_off00013228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13228 22196 bytes
SHA-256: 9917e6de70d9500aea6c07de5090c8e0f4792072b1acb895af56de7f89938111
font_02_sfnt_off0001689d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1689D 2292 bytes
SHA-256: a68d66597e4f13058f1bd6a4238142889d55fc7c69929dbb930037a6a9861c10
font_03_sfnt_off000172d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x172D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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