Malicious PDF — malware analysis report

Static analysis result for SHA-256 786681a99c912145…

MALICIOUS

PDF

83.0 KB Created: 2021-08-02 09:24:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ade29f13ff7012f1f3c2189c877c0876 SHA-1: 86565220994bf7e30589fe742315315c4362f983 SHA-256: 786681a99c912145300fd86f17536d4536a4240e330ae46e0fa871c4a5e28a25
176 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, forming a link farm. One URL specifically uses a raw IP address, indicating a potential attempt to obscure the final destination. The primary function appears to be redirecting users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a1a2a080982---78265992209.pdf In PDF document text
    • http://clear-es.net/yamituki-n/uploads/files/zatabukos.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f47b17d99c---pafozilofikupa.pdfIn PDF document text
    • https://rosewoodcity.org/nbloom/fckuploads/file/vabesoki.pdfIn PDF document text
    • https://nhahangbienhaitien.com/uploads/files/busisowunabi.pdfIn PDF document text
    • https://dotcomtravelegypt.com/userfiles/files/77287365044.pdfIn PDF document text
    • http://211.129.1.225/system/ckfinder/userfiles/files/2151772254.pdfPDF link annotation
    • https://bednidhitraders.com/userfiles/file/lidolidedem.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b095ba47122---45094190621.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/u5f7jcsrdcsrj94i92v2n55osr/xinipawaxilamisodoginiv.pdfIn PDF document text
    • https://stmarys-perthamboy.com/upload/File/derajumuzafogiviv.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/0fbc647f807b80bb95ea187fe1991084/91609929792.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160906f90271fb---18963607426.pdfIn PDF document text
    • http://elitvorota.ru/f/file/domojorodarezi.pdfIn PDF document text
    • https://www.myosiaffiliate.com/199trust/img/file/86966823346.pdfIn PDF document text
    • http://josepholszowka.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/neselajitalikomak.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/a28a2b6b5c677ff76eee781f2c8e79ce/98363304854.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5bc18539b7e2be42dc5bb5954fbd7580/newerenawoledakotaropof.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/7645a15686a7e72a1a9fa20bb9eddc2b/sewipibupixedama.pdfIn PDF document text
    • https://cakenepal.com/userfiles/file/30096467562.pdfIn PDF document text
    • https://aldurra.ly/images-editeur/img/file/79411425948.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/b2ef840a18b0b4a773a17d0e95846a5a/1973251747.pdfIn PDF document text
    • http://blackshirts1962.com/clients/f/f2/f245580d3072b78cda2271cf7a7e3f61/File/madivi.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/160838f1d719f4---moxekeloguveja.pdfIn PDF document text
    • http://share-world.tw/userfiles/file/71052572653.pdfIn PDF document text
    • http://spadhotel.com/basefile/spadhotelcom/files/63523259132.pdfIn PDF document text
    • https://hardlineconstruct.ro/app/webroot/files/userfiles/files/62192758855.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+get+fly+pokemon+emeraldPDF 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_off0000e321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE321 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB38 10864 bytes
SHA-256: 78ad68bc02955916cb97e15fa99ace7f3f4249009044e95e5623c842b5bf5cea
font_02_sfnt_off00011426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11426 16036 bytes
SHA-256: 310826bede7c5b83c2cd646cee370b06391528875f7379c902e4d2d92d996cf1

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