PDF malware analysis — malicious · 706d0e41a4e26219

MALICIOUS

PDF

100.8 KB Created: 2021-07-28 03:59:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31

MD5: d337873933106743f71470e595b06cad SHA-1: 20d451130244ffc5e0d90918212b483a54bf28d3 SHA-256: 706d0e41a4e26219331db0033abe9762a63e0c32112d88f00de70bd95637dbe5

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the links and the PDF structure indicate a likely attempt to exploit users through deceptive content, potentially leading to further malware downloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9902

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 http://jfkanacon.org/data/userfiles/files/54885877085.pdf In PDF document text
- https://xosobacninh.vn/webroot/img/files/jixuxakideso.pdfIn PDF document text
- http://crackershrimp.com/file_media/file_image/file/2158117845.pdfIn PDF document text
- http://contactconfiance.com/files/files/bubutes.pdfIn PDF document text
- https://seikico.net/img-tym/files/vonudijuwifor.pdfIn PDF document text
- https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/6052bd99a8405a801c722b9e07811be8/12533515305.pdfIn PDF document text
- https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/8214d777e73b6a3479dad2628d3d37c7/xovufoj.pdfIn PDF document text
- http://evopizza.lt/ckfinder/userfiles/files/18636165531.pdfIn PDF document text
- http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d795d800048---14926039576.pdfIn PDF document text
- http://bdn10.cz/files/file/35097024933.pdfIn PDF document text
- https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/dfa63f874e8139879187e9ca9b115e95/mizoguzuxasepoli.pdfIn PDF document text
- https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7cc1c7d0d---tekanonozuxidogudodenewa.pdfIn PDF document text
- https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/v786lksq5u2d9v4hcjv6ia2hfa/1079596375.pdfIn PDF document text
- http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f4fd4a17a---manidajimolanivid.pdfIn PDF document text
- https://gamepinleri.com/calisma2/files/uploads/fekozepupi.pdfIn PDF document text
- http://caratow.nl/userfiles/file/zikiponisasudeworexala.pdfIn PDF document text
- https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cade32754de---46904073731.pdfIn PDF document text
- http://attlas.center/userfiles/file/defajekujutepisekixuf.pdfIn PDF document text
- https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/829967d066939d788694fc838932c62d/radiremunana.pdfIn PDF document text
- http://zeroseistudio.eu/userfiles/files/7163597134.pdfIn PDF document text
- http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9992b2694---juveda.pdfIn PDF document text
- http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160e50a460c1ef---sigabamolomudalikegop.pdfIn PDF document text
- http://j-line.ca/fck_upload/file/kajikux.pdfIn PDF document text
- https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16074ca722cfca---jivoresinaleguzolujevi.pdfIn PDF document text
- http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f78cca7611---titaberupote.pdfIn PDF document text
- http://goref.ru/files/file/vifinegiziwewudewukimun.pdfIn PDF document text
- http://stressmanagement-karriere.de/userfiles/file/35658931153.pdfIn PDF document text
- http://pogotowienaukowe.com/Upload/file/rujelusigulemagoxo.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=graduation+maya+angelou+quotesPDF 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_off0001264b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1264B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00013e62.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13E62	10992 bytes
SHA-256: `a34ff3ec4dc134db3689aed4570d17b73722a741b9a1ebf46b30ae7b33a9998f`
`font_02_sfnt_off00015766.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15766	17476 bytes
SHA-256: `ff0bb8817a820bdfddf26ce1a12a2c67bdbac6bdd7222966c12ee16260f1f285`

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