PDF malware analysis — malicious · c45ca10fe2ddb983

MALICIOUS

PDF

88.7 KB Created: 2021-07-20 07:05:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: e804d6747ed8f8f548bcfcc07861ce99 SHA-1: 6814592da6cefe39a4a6c8237a2b96c67877fae0 SHA-256: c45ca10fe2ddb983a57a9ebc303706262a0ec36f2e517e31c589538aaf4652ef

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to compromised WordPress upload directories and other disposable hosting. These links likely serve as a distribution mechanism for further malicious payloads or phishing content.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

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://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/7js5cojus14ecvbfsssde69a74/48750886265.pdf In PDF document text
- https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/o9et8emjka4ieoa67efprdf5jp/80493135908.pdfIn PDF document text
- http://wannawwannie.pl/userfiles/file/miredefibanemuruwolefijo.pdfIn PDF document text
- http://yongqingtech.com/d/files/bevaluneravuzuselakogigut.pdfIn PDF document text
- https://3drm.bg/uploads/pictures/files/xofaredod.pdfIn PDF document text
- https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/erfvk2lr1r7n7kefgfea8dlf5v/kowidewiselete.pdfIn PDF document text
- https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160ccc2676b625---97608324427.pdfIn PDF document text
- http://angelojrobles.com/admin_initial_test/userfiles/file/69380457752.pdfIn PDF document text
- http://ozari-ua.com/files/file/zodivijuzosepas.pdfIn PDF document text
- http://duszek-lasu.pl/userfiles/file/wutekoniguxedorenazop.pdfIn PDF document text
- https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/f999b123050744055cc7d288f5b16a05/18166602867.pdfIn PDF document text
- http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/dnrpkv3qq4ssa1ntvpqvgem4er/2225748776.pdfIn PDF document text
- https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/jigcorlr2nb8i75vsslst7hp2j/20611374532.pdfIn PDF document text
- http://hphs1958reunion.com/clients/47465/File/gimewekotajewagake.pdfIn PDF document text
- https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbf090c3494---54344494300.pdfIn PDF document text
- http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f1d575baf9b---nuzabowoxovaluwaxujigu.pdfIn PDF document text
- http://alexforstarlight.com/clients/4/41/4125d763bdae894b2c088b8c4c0f4705/File/7224987362.pdfIn PDF document text
- https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608cdf66a8330---rubokidoj.pdfIn PDF document text
- http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16088072eaed7a---51173339018.pdfIn PDF document text
- http://furniture83.com/upload/files/40009986387.pdfIn PDF document text
- https://fotojursa.cz/userfiles/file/76043466589.pdfIn PDF document text
- http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16073f30221be5---85232092671.pdfIn PDF document text
- https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/7mm6gjqahel6gss4t8gesn1sc9/63539707504.pdfIn PDF document text
- http://www.look4job.gr/images/_user_na/file/zivifajibe.pdfIn PDF document text
- https://menlopark.com/wysiwygfiles/file/jafanudolazudolujexaj.pdfIn PDF document text
- http://arniestribu.com/campannas/file/vojomolexapig.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=the+binding+of+isaac+apk+downloadPDF 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_off0000f328.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF328	18840 bytes
SHA-256: `75b9606b19753804ca65cbc65333799be226baacf4b150d16a4b618c56231599`
`font_01_sfnt_off000122be.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x122BE	10980 bytes
SHA-256: `e62489eba21e62a1683187a72af271cbd2d17a249866096c57af66028c49d825`
`font_02_sfnt_off00013bcf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13BCF	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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