PDF malware analysis — malicious · ea68facc5ac6c169

MALICIOUS

PDF

88.2 KB Created: 2021-06-26 20:20:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: 31d777851428796e8e456b4b38a92cc8 SHA-1: 0ffdb065aff579209f988d500fb21b8d37fbcd66 SHA-256: ea68facc5ac6c169760eb28f2a8db5238f9fddf1aaab4014cb07b755ee499802

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the nature of the embedded links and the detection names indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/8bbc6e4170b0c2deb3790d752dccef31/rujexe.pdf In PDF document text
- http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b31660698c2---wewelififumenewiginix.pdfIn PDF document text
- http://myafmc.com/clients/a/a5/a51d49d85de18111a3d718c63a5e5081/File/juburuzaxosuzis.pdfIn PDF document text
- https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/f5339b861803972ec86aa6b3053777c8/3340769507.pdfIn PDF document text
- http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16081925d06cff---gawenubuzikesarosogu.pdfIn PDF document text
- http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f60e59ed43---vubexojuzonarap.pdfIn PDF document text
- https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/981cd4e0f2a596936667d61f64dfa3da/703600812.pdfIn PDF document text
- https://relans-nn.ru/images/docs/file/78416591848.pdfIn PDF document text
- http://pettwayfamilyreunion.com/clients/39389/File/lidolafupijunaliletexuj.pdfIn PDF document text
- http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bbf247dc59d---giwen.pdfIn PDF document text
- https://247hvac.ca/fabulous1/uploads/files/3749250333.pdfIn PDF document text
- http://humanitool.ru/userfiles/file/nulomenej.pdfIn PDF document text
- https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b06db53b611---15754536942.pdfIn PDF document text
- http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/77slg9601ub480n7c6t20hmb0q/61535403638.pdfIn PDF document text
- http://www.knickmeier.net/images/pageimg/file/44835876580.pdfIn PDF document text
- https://nhatngudongkinh.com/upload/ckupload/files/55165465510.pdfIn PDF document text
- https://angkorphotographyguide.com/userfiles/file/83690419127.pdfIn PDF document text
- http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609fac09114c3---muvevupuxuvivokisunavu.pdfIn PDF document text
- https://genegurumiraclehealer.com/userfiles/file/limanoro.pdfIn PDF document text
- http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f8d73e476a---48721475793.pdfIn PDF document text
- https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/09c1kqs4mvqcf1bv612dldgqg2/gitewurowum.pdfIn PDF document text
- https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160928d479430d---suxikozoloju.pdfIn PDF document text
- https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/bc7346431bf7819526e2ace3d0b9ffad/tiruwotomozatubiburol.pdfIn PDF document text
- http://duszek-lasu.pl/userfiles/file/67301681224.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=watch+cats+2019+online+free+musicalPDF 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_off0000f388.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF388	17880 bytes
SHA-256: `ea1ecb80a011844baa27a0f3ca987c05fbb9b37cbc165f9c9d10cf88c7fbf4b6`
`font_01_sfnt_off000121ac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x121AC	11156 bytes
SHA-256: `fc5a26c0d532093984d90cece794b69efa515272891231e319a3431596fd0ed8`
`font_02_sfnt_off00013bad.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13BAD	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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