PDF malware analysis — malicious · 62a383bdc125a7c4

MALICIOUS

PDF

92.7 KB Created: 2021-08-05 06:38:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 667526b220f72086c43fb066544ab449 SHA-1: a729645d03fa15f98b3857db1aaf8bce76bc1d82 SHA-256: 62a383bdc125a7c4c63a258851bed39a44293b04596777d6e2963ea357ed3e55

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The file contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute phishing content or malware. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this assessment.

Machine Learning

Nyx PDF Classifier malicious score 0.9822

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://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/c87023db0f9f5efe997f81c15e10d98e/wijelokujewamat.pdf In PDF document text
- http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/160886afebc87e---lekumedukuzemonugavuxur.pdfIn PDF document text
- http://elitvorota.ru/f/file/16484716103.pdfIn PDF document text
- https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e30d5fc74b5---51319851510.pdfIn PDF document text
- http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b7cc13581---57326119670.pdfIn PDF document text
- https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/d0fe55486a390283dac6b809d0a83ace/livodagibebinesig.pdfIn PDF document text
- http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c55c85c2e---logosadabuf.pdfIn PDF document text
- http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607d22f0c5ae6---68497168231.pdfIn PDF document text
- https://jasz-pap.hu/UserFiles/file/memab.pdfIn PDF document text
- https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a4584258dbf---riromaxat.pdfIn PDF document text
- https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/52973259148.pdfIn PDF document text
- http://dgjst.com/upfile/file/limigidora.pdfIn PDF document text
- https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/57ec1f361d4ed600bc24ba1fd1602813/21839116167.pdfIn PDF document text
- http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b3113be42ec---41493597321.pdfIn PDF document text
- http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/a67a481e7e9b24fe54e20505cb764a82/70822189391.pdfIn PDF document text
- http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/56661962933.pdfIn PDF document text
- https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/6395174749.pdfIn PDF document text
- http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d8187a36c---98251138161.pdfIn PDF document text
- https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160af978108ea2---vememo.pdfIn PDF document text
- http://usagimatur.com/files/others/69947206296.pdfIn PDF document text
- https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/10849c426c39676de07c71b81060134e/ragulik.pdfIn PDF document text
- http://dongshengcable.com/images/upload/File/kojizokijugeleju.pdfIn PDF document text
- https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/1vng2f30dogd955861ncdk70ui/digilusoduzirofiraje.pdfIn PDF document text
- https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/2d79de88ccaac5fea57f1e9d6fd5c7be/josomemetadutikepet.pdfIn PDF document text
- https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/3215486669f26b4c65f388eb6dff06b7/12233711908.pdfIn PDF document text
- http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607daebc2417f---domoluxodojixolatevuge.pdfIn PDF document text
- http://moto-trend.cz/public/files/fck/file/xozuwitizivivokabinidi.pdfIn PDF document text
- https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b3f270a7493---99333269181.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=movimiento+rectilineo+uniforme+que+esPDF 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_off00010394.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10394	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00011ba6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11BA6	18656 bytes
SHA-256: `7645eac65b2029b6e6b1119a127396b7e1757176e855f755ccb20d757ceaaa9e`
`font_02_sfnt_off00014c98.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14C98	10640 bytes
SHA-256: `338ad4afcf39008c96f157c340418b0097068892ae71a26978a891ccd6c17d27`

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