PDF malware analysis — malicious · 032af9a30e961db6

MALICIOUS

PDF

81.6 KB Created: 2021-08-23 10:20:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 221f22178bc0ba05de357c80619afcec SHA-1: 0202ec693944b2bce1e2a8ac12f3db4e2c09a8bf SHA-256: 032af9a30e961db66edef0e6a6e73218b37118bedceb46e85b75af0b06881d8d

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload storage and other disposable hosting sites. These links likely lead to further malicious content or phishing attempts, consistent with a spearphishing attachment attack vector.

Machine Learning

Nyx PDF Classifier malicious score 0.9917

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://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606e4ecb93952---83296066827.pdf In PDF document text
- http://www.lebedosapartotel.com/data/yukle/files/21261603328.pdfIn PDF document text
- http://sieuthibongda.net/ckfinder/userfiles/files/73640699141.pdfIn PDF document text
- http://tokyosushilohaus.com/uploads/files/3708976967.pdfIn PDF document text
- https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/c56d49ab3176203d6e8def00d334c395/59483710070.pdfIn PDF document text
- http://tomaszskiba.com/userfiles/file/bipuposoteniripexezepe.pdfIn PDF document text
- http://timebymtm.com/upload/files/poxami.pdfIn PDF document text
- https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/48deb106200a647b55359ef191f7dd85/judatetedaveju.pdfIn PDF document text
- http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160bd09d0df3ef---serabinunugeduje.pdfIn PDF document text
- http://qzgyhs.com/Upload/file/62623481827.pdfIn PDF document text
- http://cestovni-postylka.eu/userfiles/file/voxeriregozolorugig.pdfIn PDF document text
- http://birzebbugastpetersfc.com/files/file/fifenala.pdfIn PDF document text
- https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/638beef091a4981644a9ae6e2336aac1/japezabelovu.pdfIn PDF document text
- http://afghansolar.com/userfiles/file/23168907842.pdfIn PDF document text
- https://www.acetechnology.co.in/wp-content/plugins/super-forms/uploads/php/files/476f5tv27on4494v07lktk98qn/ditixopaginitojixavikajo.pdfIn PDF document text
- http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160b1613b14dcb---baraguxoboguvosozu.pdfIn PDF document text
- http://kingalbertltd.com/uploadedfiles/file/sosujabipuguzudulivafozo.pdfIn PDF document text
- http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/41cpf4ipkeugggqrparvnbd454/69195296073.pdfIn PDF document text
- http://htygroup.com/upload/files/zimelumesaxosolunijubuwiv.pdfIn PDF document text
- http://arcdesantmarti.com/biocop/Images/images-editor/file/masaj.pdfIn PDF document text
- http://www.motorradfreunde-toggenburg.ch/up/files/sibajidanifiperepuzi.pdfIn PDF document text
- https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a36e265cd46---42042538940.pdfIn PDF document text
- http://mercuresamuichaweng.com/admin/file/58050126673.pdfIn PDF document text
- http://kozelsk-adm.ru/files/uploads/files/52999276835.pdfIn PDF document text
- https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/109201bfe7f4b7695a53fc09b4570305/bajev.pdfIn PDF document text
- https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aafffd3124f---xatuvisubofepatobubovuto.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=hither+and+yawnPDF 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_off0000d8bb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD8BB	18416 bytes
SHA-256: `979f2d0035cb9ce3fb9efd08186b0ded492a893043eb6c4659ed8c1ac9ec8b60`
`font_01_sfnt_off000109db.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x109DB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000121f2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x121F2	10200 bytes
SHA-256: `77bb1bd1a408f0620af21ea7f1e05a371d925ba1b3496bc43435dfef40cd73cc`

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