PDF malware analysis — malicious · 7500dee21a1563e9

MALICIOUS

PDF

85.5 KB Created: 2021-07-02 20:24:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15

MD5: 1b7fcfb3ff2ab25ce5a262fe39916b9d SHA-1: f89c5c0144e3d94a6b992a2c2a391ab55e963653 SHA-256: 7500dee21a1563e9fa34b7bc84b3735abaedbd1115bb3ce218a2d8e94729e886

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous links pointing to compromised WordPress sites, indicating it functions as a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly suggest a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608149a51f6e9---ponoxonidezosuwopunajasi.pdf In PDF document text
- https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/ac4b27b815d9c42c02edafc3d6c2bd37/13387778912.pdfIn PDF document text
- https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/34c95341829911e14e253937377ae901/54810556145.pdfIn PDF document text
- https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094491a6fbbf---najozolokikif.pdfIn PDF document text
- http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ceb61d71546---muvomifawa.pdfIn PDF document text
- https://alatheir.com/atheirwsfiles/file/jimibesexofiponunewiro.pdfIn PDF document text
- http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ceb0a3867bc---28019243552.pdfIn PDF document text
- https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3602b312b---92845775410.pdfIn PDF document text
- http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c2e2407f7---39267857661.pdfIn PDF document text
- https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/in6ibjqric37r6lfk101eilibk/73576030128.pdfIn PDF document text
- https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/2e96647f9fdc036761d5c3dc273d6c6b/77786356990.pdfIn PDF document text
- http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160d95bb7b0f3f---wetiwamizowuves.pdfIn PDF document text
- http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608a780b59b08---dosopagutop.pdfIn PDF document text
- https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/fda2dd3a0b3a7b4e741d68796abff49c/pebanujajezow.pdfIn PDF document text
- https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/81563d6d84c8b96f1f4c84f332653f25/15073398197.pdfIn PDF document text
- https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608444e9acf6c---peziguwedefamizazuve.pdfIn PDF document text
- http://el-master.ru/userfiles/file/41904863047.pdfIn PDF document text
- http://adria-ex.com/images/blog//file/15373512004.pdfIn PDF document text
- http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/75a2eabc14c888bca338007f67f5df2d/lonevuradesi.pdfIn PDF document text
- https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/t9u8qhio3fva6eupmv033ca62u/pitigarefosubumubuxijib.pdfIn PDF document text
- https://christianklein.eu/Quansis/ckfinder/userfiles/files/furum.pdfIn PDF document text
- http://archi1919.com/smlclub-files/file/16527643011.pdfIn PDF document text
- http://droprint.my/home/ququ4923/public_html/userfiles/file/gogutodirukojawuv.pdfIn PDF document text
- https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/416b0e77e5cb5e02ec351ee0cac28036/95130930524.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=with+this+situationPDF 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_off0000edd3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEDD3	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000105e5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x105E5	16808 bytes
SHA-256: `ef277c351156de25f719f6ca56750b96e68fc7f397a1f81f2e48e9ace5afcf93`
`font_02_sfnt_off0001316b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1316B	10020 bytes
SHA-256: `f2d233cc84d8e7244d3e7ce4d5db9300ef922808d2a041edcae98ba31adb3dcb`

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