PDF malware analysis — malicious · 0cf080a36dfdd2f0

MALICIOUS

PDF

87.3 KB Created: 2021-06-27 07:58:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 0889036ade8be4cd2fe8b492d3b21385 SHA-1: fccdd5b0f448eefdf754d9468386c20c430872a9 SHA-256: 0cf080a36dfdd2f0c3d8c3b5708c82f21cccfe6a9a412435068e4efef3fe6a59

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution attempt. Although no scripts were directly extracted, the presence of numerous external URIs and the nature of the heuristic firings indicate a malicious intent to redirect users to potentially harmful sites.

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 http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c0a64ca70---56409390114.pdf In PDF document text
- http://chinasoftcore.com/userfiles/file///2432468473.pdfIn PDF document text
- http://dichvutheapec.com/upload/FCK/file/58156334084.pdfIn PDF document text
- https://weyergans-hcc.lv/userfiles/file/9701511008.pdfIn PDF document text
- http://amdind.com/userfiles/file/23694361128.pdfIn PDF document text
- http://desagresbrts.com/clients/34568/File/77909674178.pdfIn PDF document text
- http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091f2a2dffa0---58786894891.pdfIn PDF document text
- https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609a61a29a51b---raferedivoxanebepexube.pdfIn PDF document text
- http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ddc7f1edc1---15772822868.pdfIn PDF document text
- https://thinkhigh-tech.com/d/files/ponudiwitejupibolimaguda.pdfIn PDF document text
- http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b348ebd8caff3a3760fca41a2cd11872/tisof.pdfIn PDF document text
- https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/9a74031c9ccfcbbe6acee6896f5804a8/87801640005.pdfIn PDF document text
- https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160947bfae2c9d---86275188016.pdfIn PDF document text
- https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/gcbviqnkl1ffme20csbftfj607/12762925720.pdfIn PDF document text
- http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16094bc3c9e639---2994727812.pdfIn PDF document text
- http://muzeumostrowiec.pl/obrazy/file/kenamikokodivo.pdfIn PDF document text
- http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/16084c54d3b9b6---39584729032.pdfIn PDF document text
- https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/19df3bf737513020948a926d731114f4/suvenule.pdfIn PDF document text
- http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e9ca75a02---33957311691.pdfIn PDF document text
- http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4b7b87906---lobapenexas.pdfIn PDF document text
- https://haps.company/wp-content/plugins/super-forms/uploads/php/files/t441toemceeqoona35oe1eevs1/tajonokorekenemumu.pdfIn PDF document text
- http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb9e96301f---bosubufoxoxujotobalepe.pdfIn PDF document text
- http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16073e8b6ac485---vetupokodipopu.pdfIn PDF document text
- https://dallaslandscapedesign.com/media/files/91750154321.pdfIn PDF document text
- http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ead4277cf1---basolonivob.pdfIn PDF document text
- https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad1823cba9c---51983136231.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=posterior+compartment+of+armPDF 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_off0000f7c0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF7C0	10596 bytes
SHA-256: `1885c9e58b2765772036266a9e14a8a40797f21dacd1896a27db4e8fbfa3034c`
`font_01_sfnt_off00010fff.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10FFF	15676 bytes
SHA-256: `16f8cdd52d9c997ec52b9d482bca2e8a078e405fb6049dc3a0e61f8a1508a77c`
`font_02_sfnt_off000137ac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x137AC	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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