PDF malware analysis — malicious · bdf039233985a9ba

MALICIOUS

PDF

88.1 KB Created: 2021-09-02 22:23:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 399cf40c5d31b3e5bdd2e9f4981c90eb SHA-1: d2de8be00fa3dcd135376734aded458d8e70cb05 SHA-256: bdf039233985a9ba3e82ef3bfd4be15b0f74e8536a09af1470aafd585184edf0

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, directing users to numerous external URLs, several of which are hosted on compromised WordPress upload directories. The presence of multiple links on disposable hosting and the use of UTM parameters suggest an attempt to lure users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9954

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://crewmak.ru/uplcv?utm_term=visual+basic+6+tutorial+for+beginners+pdf PDF link annotation
- http://stroisvias.ru/userfiles/file/32042885661.pdfIn PDF document text
- https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/3oak3rci92hkcgv0hpe8jjhjfa/jejidafamadakisil.pdfIn PDF document text
- http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609c91dab6eab---fegeri.pdfIn PDF document text
- https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/sspavi21a2nf96ivfiaa9qpfil/81646712358.pdfIn PDF document text
- https://wittnebel.dk/file/pazarenedo.pdfIn PDF document text
- https://gagiongvitgiong.com/ckfinder/userfiles/files/pinosinutux.pdfIn PDF document text
- http://stjconsulting.it/userfiles/files/27909832659.pdfIn PDF document text
- http://cymrozgreatdanes.com/clients/1/1a/1a407d8ccac5525c71aaafb6b4664123/File/42824258450.pdfIn PDF document text
- http://ciarajewellery.com/editor_upload/file/gazujobojaboto.pdfIn PDF document text
- http://automotiveenergy.cz/userfiles/file/puwejo.pdfIn PDF document text
- https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/5a81ae6d7b262010c4f839af26d386a7/feroxopesegasobebogega.pdfIn PDF document text
- http://texinpack.com/uploadfile/file///2021082406183338.pdfIn PDF document text
- https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/9dbh2vgs5iviv5qqlpno6jllpt/mifotetepevixojanitekidu.pdfIn PDF document text
- http://zrdb-drogbud.pl/Upload/file/49444764102.pdfIn PDF document text
- https://fwullong.com/upfiles/editor/files/19214462431.pdfIn PDF document text
- http://maxbrio.kr/files/files/netaxexexovikavagewumolu.pdfIn PDF document text
- https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e42e9de8a1---xezuguwawifabegowi.pdfIn PDF document text
- https://hogozaty.com/ckfinder/userfiles/files/verizaguxibefigazime.pdfIn PDF document text
- https://www.analfissur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aee9b86ec6---73669473753.pdfIn PDF document text
- https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/nm4m701kd9ip4bbdsck2jvnq2v/butolinifaro.pdfIn PDF document text
- http://boathousebrokerage.com/userfiles/file/fovumavaw.pdfIn PDF document text
- http://asupuro.com/upload/save_image/files/26748695256.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000da34.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDA34	18076 bytes
SHA-256: `abaed50c6c4ae0e88245b53a6d0731026633233df94d66f743bd3a7a16d4be0d`
`font_01_sfnt_off0000f5a0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF5A0	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010db7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10DB7	11172 bytes
SHA-256: `27ab38e841f67271adf74300bf945f4672efe6ef77ee354a754f89ea6466d20d`
`font_03_sfnt_off00012792.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12792	16496 bytes
SHA-256: `d8b26ac020a529cb13124b6ee08d3f6ca5db8c566ff4d24ad5d449ca04320eab`

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