PDF malware analysis — malicious · 58fb340f995e0f65

MALICIOUS

PDF

87.1 KB Created: 2021-07-17 17:31:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: a2d1a7cb10ac49f1b25ee714860772fa SHA-1: ed69734da1668b5bfcd03527000415043a1572db SHA-256: 58fb340f995e0f65d99b9545f1e557560997594a997cb00139c0abc255a066da

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised or disposable domains, which are characteristic of link farms used to distribute malicious content or conduct phishing attacks. The document body is unreadable, but the heuristics and URLs strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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 http://uss100.com/clients/5/56/562308f4da1da23328cfd9e5c9f3e68f/File/kulexufila.pdf In PDF document text
- http://wwpokebar.com/uploads/files/5006962024.pdfIn PDF document text
- https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16099fe0ca359b---direzuxiduvegijomoxiweg.pdfIn PDF document text
- http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f4fa6fc87---jolowexiximilikavaz.pdfIn PDF document text
- http://otoozevran.com/resimler/files/40719589643.pdfIn PDF document text
- https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcf3a4a2df5---40148648327.pdfIn PDF document text
- http://avsa.org/sites/default/files/images/files/vugebuxeni.pdfIn PDF document text
- http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/kjjbil78dh16lk8keh3jmia7dc/tebofagenepivosij.pdfIn PDF document text
- https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/406870019acb93ce527a3b1fb8eef882/33896386837.pdfIn PDF document text
- https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5d302dc24e---wurabejewidedo.pdfIn PDF document text
- http://centralwestwoodclassof1983.com/clients/c/cd/cd4b3c89dd1500142a52f05b9125c350/File/48862206838.pdfIn PDF document text
- http://stinpo.com/ckfinder/userfiles/files/7928335861.pdfIn PDF document text
- http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc6e37b9f45---38693157434.pdfIn PDF document text
- http://a2itsolutions.com/chop/multimedia/userfiles/file/82403947474.pdfIn PDF document text
- http://psystems.gr/Administrator/uploads/userpics/OutPostImages/files/natonij.pdfIn PDF document text
- http://uniradioweb.info/userfiles/files/43990947851.pdfIn PDF document text
- http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vebotegipulobamifuxug.pdfIn PDF document text
- http://caratow.nl/userfiles/file/27540879888.pdfIn PDF document text
- http://eotp.info/sites/default/files/fck/file/36548710592.pdfIn PDF document text
- http://cuatro-pr.org/sites/default/files/file/6170607223.pdfIn PDF document text
- https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/621a0b9988498343956db3cb61cc79dc/89983620352.pdfIn PDF document text
- https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086fed54ede7---bademixedima.pdfIn PDF document text
- https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/a0cs583a0r1njcn8lkpic51ost/jekob.pdfIn PDF document text
- https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf087971e7---59471613439.pdfIn PDF document text
- https://madopin.com/calisma2/files/uploads/26816723701.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=child+to+teenagerPDF 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_off0000f2d9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF2D9	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010aeb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10AEB	17560 bytes
SHA-256: `ec85a285fe332df8630bf83ead8f54d3c1e7ac5fb7436b26ed8da289a5417c43`
`font_02_sfnt_off000138c3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x138C3	10392 bytes
SHA-256: `fc79dfbbbe134f070d0e03a1c0df3d7b69acc43aa76fa8de855f89fbd051b925`

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