PDF malware analysis — malicious · 002b28c996caf028

MALICIOUS

PDF

85.4 KB Created: 2021-07-20 06:37:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 8b0547ff6e90e7a6f604069171142f78 SHA-1: 839bbc5d838fa3d1b18b1ea57c66202ccd669faf SHA-256: 002b28c996caf0282da3bbe3358deef12fe4ef00fa4e6a728970fa869d300be6

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with numerous URLs pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of many unknown URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly support this attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9860

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://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608558fa255a3---xegopuzabisiguzovomuxapog.pdf In PDF document text
- https://drsaman.com/files/fipulusimapaxevaredi.pdfIn PDF document text
- https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160706b7dd61ee---3422882249.pdfIn PDF document text
- http://anvlaw.com/userfiles/file/gagesidesitodexasos.pdfIn PDF document text
- http://globalbando.com/DATA/upload/files/202106291836597153.pdfIn PDF document text
- http://fixafilm.se/userfiles/file/6837435860.pdfIn PDF document text
- https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16071d40e3e5d8---95694479032.pdfIn PDF document text
- http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b57d08085cd---lufon.pdfIn PDF document text
- http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160be50ff5c0d1---85693967715.pdfIn PDF document text
- https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/ldir4uis6ags6ic2na0rfuunh7/kebaduzolovefagajoseriko.pdfIn PDF document text
- https://ms01bet.net/contents//files/zugusewunakox.pdfIn PDF document text
- http://mai-colle.jp/userfiles/file/63914627585.pdfIn PDF document text
- http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071dafea2d06---xuvokilavegami.pdfIn PDF document text
- http://cdkkck.com/uploadfile/file/20210524144410.pdfIn PDF document text
- https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b051937dcaf---62766178422.pdfIn PDF document text
- http://absolutelyneon.com/userfiles/file/sisunezixikixefexa.pdfIn PDF document text
- https://mimpishio2bet.com/contents//files/janod.pdfIn PDF document text
- http://evola.it/userfiles/files/rojovidugutogud.pdfIn PDF document text
- https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/93c90c786cbf61ede7ed672b7a637943/92672449908.pdfIn PDF document text
- https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096f47cc183e---71585378487.pdfIn PDF document text
- https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af40a6a2e0d---81521188642.pdfIn PDF document text
- http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607197230295b---6147792884.pdfIn PDF document text
- http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2a46555b55---valaxajafipaguroga.pdfIn PDF document text
- http://www.scsi.coop/wp-content/plugins/super-forms/uploads/php/files/b8d312abb12a918eb44cb53331df25fd/viralowajakozobi.pdfIn PDF document text
- http://medipharmacompany.com/userfiles/files/32742650475.pdfIn PDF document text
- http://sghscsjamarai.org/guruhargobind/userfiles/file/57539426088.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=eggplant+with+minced+porkPDF 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_off0000ea84.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEA84	10952 bytes
SHA-256: `72d3e7481bc2d5c3be6e892e50801178ec600fea32ec330c028560f384de3ee9`
`font_01_sfnt_off0001038f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1038F	17056 bytes
SHA-256: `442830911413964feee8243efcc89aa3079d6367bcc0721565c63095732695c9`
`font_02_sfnt_off00012ff2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12FF2	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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