PDF malware analysis — malicious · a676644956d4dabd

MALICIOUS

PDF

81.8 KB Created: 2021-09-04 15:04:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: a30e8d1d98af926bc9b56fd5711690c5 SHA-1: e815dfcc16ff32f9e894042cdc22714ee8e8764d SHA-256: a676644956d4dabd6109449cd805f39e4557802e64471956b88ec8ede3c4e21e

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external URLs hosted on potentially compromised or disposable domains. While no scripts were explicitly extracted, the presence of numerous external links suggests a phishing or malware distribution attempt, aligning with the Spearphishing Attachment technique.

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=basic+embedded+c+interview+questions+pdf PDF link annotation
- https://strategieb2b.com/userfiles/file/muzebofurebejoliv.pdfIn PDF document text
- http://philipwillettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/18692151088.pdfIn PDF document text
- https://rachelrom.com/rescontent/file/92324826017.pdfIn PDF document text
- http://tuanayapim.com/rsm/files/59324008205.pdfIn PDF document text
- https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077d0f336236---45985050735.pdfIn PDF document text
- http://capitolmetrophysicaltherapy.com/userfiles/file/72548987914.pdfIn PDF document text
- http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/a1ab906a572c3cf29fcc158081246429/1556447721.pdfIn PDF document text
- http://bigyikesmedia.com/home/xtremweb/public_html/consultinstitute/web/upload/files/jinurevoludomirulom.pdfIn PDF document text
- http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160aab69887cf9---97068563047.pdfIn PDF document text
- http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/16073a84bde01f---fuwojofokebopebu.pdfIn PDF document text
- https://hotnewsmd.deca.md/upload/userfiles/files/58601815198.pdfIn PDF document text
- http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/16072ec0960707---34742103362.pdfIn PDF document text
- http://studioingegneriavaragnolo.com/userfiles/files/95898280266.pdfIn PDF document text
- https://geneticapanama.com/userfiles/file/94757692088.pdfIn PDF document text
- https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/168f8b4aacef7c18f1c9a617385c53f7/75563471090.pdfIn PDF document text
- http://timavoshipsupply.it/userfiles/file/3447593956.pdfIn PDF document text
- https://aduanaldelvalle.com/userfiles/file/82871871541.pdfIn PDF document text
- http://rasciindia.com/firetech/ckupload/files/15162199115.pdfIn PDF document text
- https://zionapostolicministries.org/uploads/file/97779202634.pdfIn PDF document text
- https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/0b84ed850c143fdcc34126942b28c237/dixosivaje.pdfIn PDF document text
- http://skrutit-probeg.ru/upload_picture/file/4836798591.pdfIn PDF document text
- http://fred-robin.com/ckfinder/userfiles/files/rajoxubavaki.pdfIn PDF document text
- https://pristineleather.com/userfiles/file/fufuduvarofasikajixeliwi.pdfIn PDF document text
- http://ahcxdq.com/uploads/file/251806403180.pdfIn PDF document text
- https://biovuspharma.net/userfiles/files/71278807049.pdfIn PDF document text
- http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609ebbe930430---fekakuj.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_off0000da53.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDA53	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f26a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF26A	11324 bytes
SHA-256: `ac800e56dbceaa1bdf5df38ce0a03a54b557fcdf12b1883fcd55a685455bcf98`
`font_02_sfnt_off00010cb5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10CB5	17480 bytes
SHA-256: `00ac597e659bfbfc7c0acd951a8a7c8f2f9e4f8fee810d1763eb0b9ee7b939a7`

Open this report in the interactive analyzer, or submit your own file for analysis.