PDF malware analysis — malicious · d9c5a4b0f4cba610

MALICIOUS

PDF

82.2 KB Created: 2021-06-30 23:25:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: c65c4320017b1b04d2e5f1f6ab6d0fff SHA-1: 32fd81f5ddc51035b7a748bd8904bfb3210691f7 SHA-256: d9c5a4b0f4cba6105317dfbb5bd04132b0f1d35b3778d0da9bbe919aa616a646

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous external URIs and links to compromised WordPress upload storage, indicating it functions as a link farm. The primary goal appears to be directing users to potentially malicious websites, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9846

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://drafthe.ru/uplcv?utm_term=clear+muscle+sx+7+revolution+reviews PDF link annotation
- https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b23dc2b84c7---31296952882.pdfIn PDF document text
- http://meble-tk.pl/userfiles/file/gavobiba.pdfIn PDF document text
- http://bellina.pl/userfiles/file/widejuvumazesivi.pdfIn PDF document text
- https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/cc51799906dd6bcba1cd64a17f388337/56516027876.pdfIn PDF document text
- http://schokozentrale.de/idata/xelomunotum.pdfIn PDF document text
- https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/5q6ccoo4ijqd94uhgt37kl3btg/wizowajoritumuse.pdfIn PDF document text
- https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b95d7e93a9b---maxipekisowomige.pdfIn PDF document text
- http://www.urbanwaterways.info/files/dutatogukapawi.pdfIn PDF document text
- https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5fee3c19ac9f1e4ca04801bfd7f5de14/tijapavovef.pdfIn PDF document text
- http://jordanfamilyreunions.com/clients/5/51/51534e3e38036466a76ca8a024fd4923/File/fanibekagasev.pdfIn PDF document text
- http://odpadykj.cz/UserFiles/File/18557268419.pdfIn PDF document text
- https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/960a3fcb3f4d471da1ea4a6b429b9320/88412467851.pdfIn PDF document text
- http://lmyc.net/clients/875386/File/legidugokufodelivava.pdfIn PDF document text
- https://stillwaiting.org/userfiles/file/69072937452.pdfIn PDF document text
- http://toyotalongbien.org/data/dulieu/files/11397105581.pdfIn PDF document text
- https://stpeterscbs.ca/ckfinder/userfiles/files/37760371469.pdfIn PDF document text
- http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a62c49c7994---naxinufofisex.pdfIn PDF document text
- http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7b3de4d50---todilid.pdfIn PDF document text
- https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/1cd45c40a368e3e9dff247821a1238da/10883003479.pdfIn PDF document text
- https://lanna-flyingclub.com/ckfinder/userfiles/files/kidivape.pdfIn PDF document text
- https://mimpishio1.com/contents//files/kuwotarejekiwugaxuzogakaf.pdfIn PDF document text
- https://aviatroglo.fr/IMG/file/56002474588.pdfIn PDF document text
- http://roocenter.ru/upload/file/nivakulaxekebomapadar.pdfIn PDF document text
- http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607f35b48a2c4---61627706786.pdfIn PDF document text
- http://fw-simple.com/uploads/files/86818773213.pdfIn PDF document text
- https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a994f3e759---49098885233.pdfIn PDF document text
- 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_off0000db5b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDB5B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f36d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF36D	17656 bytes
SHA-256: `0a154df94a195db093a8bbfafe0b7cc694e5cd90505314b9555ce092fd535821`
`font_02_sfnt_off0001220f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1220F	10824 bytes
SHA-256: `bafc0793020fb299c53e7b5940cca7b803247427698571ab27d3dc2fad95b449`

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