PDF malware analysis — malicious · c1c074d57928b2e5

MALICIOUS

PDF

79.1 KB Created: 2021-08-16 17:00:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: b0a82d463884cd0ef0bd5d0fbb5489a1 SHA-1: 47afb29e10ebfb43772d501eda0080550b362ec0 SHA-256: c1c074d57928b2e515a82f8c53fa5554f0dfab04f4cd0de91fd881771384fd96

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9948

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://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/58ca9024f08a5df1867cdb4e112a2c02/xilumoz.pdf In PDF document text
- https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/e3d50164f5cd1b9c88e8a590c6368f4a/87307660834.pdfIn PDF document text
- http://ackerviewguesthouse.com/userfiles/file/37657970687.pdfIn PDF document text
- http://aczelzalog.hu/tmp/45790757983.pdfIn PDF document text
- http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a838950be50---82321219575.pdfIn PDF document text
- https://jotelek.hu/files/file/1876447931.pdfIn PDF document text
- http://noahjohnsonsark.com/clients/e/ef/ef24418f2336b9480f3353ee42fa3f58/File/82131910369.pdfIn PDF document text
- http://jkphotocon.org/data/userfiles/files/9449101747.pdfIn PDF document text
- https://xn--faade-zra.ch/ckfinder/userfiles/files/13578186857.pdfIn PDF document text
- http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16079a8492f7e0---81373859378.pdfIn PDF document text
- http://grapevinewinerytrail.com/clients/876125/File/lapij.pdfIn PDF document text
- http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e26ef2a8a---7018722176.pdfIn PDF document text
- https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/7d5be6c533374af1ddfc27e5394a4a52/zodirikajoriwusugaxisu.pdfIn PDF document text
- http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/0a97qf93070d5n6shl66f58dl1/71561366028.pdfIn PDF document text
- https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160f2013d7f7db---bigus.pdfIn PDF document text
- https://baoholaodong24.com/userfiles/file/ximasi.pdfIn PDF document text
- http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609a35d1e72d9---budewugakewu.pdfIn PDF document text
- http://cp-tournament.org/ckfinder/userfiles/files/lejasatevo.pdfIn PDF document text
- http://lagunaapartman.hu/images/user/file/11653196808.pdfIn PDF document text
- https://cortemadera.com/wysiwygfiles/file/16654352755.pdfIn PDF document text
- http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e81a060a1ef---vikovixovafowamoramo.pdfIn PDF document text
- http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1eea51f913---geveru.pdfIn PDF document text
- https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/d7d3823913eaf12de65d26526fc04d81/19267215689.pdfIn PDF document text
- https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/635725f9a4a7bd64821e69792244f366/lotorotipewukujiwi.pdfIn PDF document text
- http://cavusofis.com/images_upload/files/wexonezarudi.pdfIn PDF document text
- https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ffc3d301df---nofefuvijimujexoduror.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=abide+in+christ+andrew+murray+pdfPDF 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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d22d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD22D	16356 bytes
SHA-256: `888867a1142bf811bc114f62678cf5907b4900a9db534f8a7a40c1da28495c9a`
`font_01_sfnt_off0000fcbf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFCBF	11140 bytes
SHA-256: `da6a332456c175b51df3bd8d16bce443967dcc4683edd0b68ef74c21117d9e95`
`font_02_sfnt_off00011676.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11676	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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