PDF malware analysis — malicious · 7dbac49792231b64

MALICIOUS

PDF

86.9 KB Created: 2021-09-01 07:45:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: d28f5f0eb311a0a9c1a462e216cb1df2 SHA-1: 81318e838ca0dcac5a9240b1c1997ef0d030890f SHA-256: 7dbac49792231b645b674e03a1ed25a26ec8c5d93d8fbfbd10e4dbf1324f161e

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links, many hosted on compromised CMS upload directories or disposable domains, suggesting it functions as a link farm to distribute malicious content or conduct phishing. No scripts were extracted, but the structure and URL patterns indicate a likely attempt to exploit users via malicious links.

Machine Learning

Nyx PDF Classifier malicious score 0.9904

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://deltarents.com/upload/ckfinder/files/lenomenolusukin.pdf In PDF document text
- https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608648421241d---61006540405.pdfIn PDF document text
- http://aclamerica.com/customers/CMS-IMAGES/file/tuxezenifewiguno.pdfIn PDF document text
- https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/b929a59d52d1d04ff97eac65240629c7/66791407992.pdfIn PDF document text
- https://valenciamaids.com/userfiles/files/21300821975.pdfIn PDF document text
- http://ronniejoymemorialfund.com/clients/1/1a/1a75100f29d804137a154ca93ef51a80/File/giguvixade.pdfIn PDF document text
- http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5bb2330cd2---36494967466.pdfIn PDF document text
- https://bouwservicewinthagen.nl/userfiles/image/file/pavaxugufabenuvokogu.pdfIn PDF document text
- https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/269dd7049df98d232d2e4cef56f58966/1738484874.pdfIn PDF document text
- https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/58b1a859da4d6385093648884787327e/sofakuvuxadipalabod.pdfIn PDF document text
- http://mobydick-band.de/fckdata/file/gasepigitatipesozaluke.pdfIn PDF document text
- http://jngf.cn/files/file/fazefu.pdfIn PDF document text
- http://oikoscoccatoarchitettura.com/userfiles/files/12032793862.pdfIn PDF document text
- http://bestorkate.com/uploads/ckeditor/files/vegunujoxemerovetutokipir.pdfIn PDF document text
- https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/85632351763.pdfIn PDF document text
- https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/b3m2omeklsimtqkcmh8qra5kth/40366592376.pdfIn PDF document text
- http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16113a2312b8bf---40097987380.pdfIn PDF document text
- http://1utilaje.ro/mm/file/pukiwolixiwalepavadodupif.pdfIn PDF document text
- https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/29pcccvuurvifit6u3prsp0jt5/2432314215.pdfIn PDF document text
- http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609b4167e30b7---toxaxozidil.pdfIn PDF document text
- http://biosite.ru/images/news/file/solizegagegopapaxelexi.pdfIn PDF document text
- http://ytlcases.com/userfiles/file/ruseliw.pdfIn PDF document text
- https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/6ecddd30488f9a791b0bcbcd53e0892e/16472091562.pdfIn PDF document text
- https://wtmasonry.com/ckfinder/userfiles/files/gumosisoditedalowabaxe.pdfIn PDF document text
- https://stijsr.com/userfiles/file/xunopajazix.pdfIn PDF document text
- http://usateatop.com/_upload/files/tirosiloku.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=yorkie+mixed+with+poodlePDF 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_off0000ee3a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE3A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0001064c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1064C	17912 bytes
SHA-256: `150942559d4375d721d9dc202a6d3fd2bd5dff373040d3cdb9ecda2dda4b54e7`
`font_02_sfnt_off000134d7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x134D7	10488 bytes
SHA-256: `5e50b30d60506d29cfc904540c97abbf571fba371997e1caed67005fdef06b62`

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