PDF malware analysis — malicious · dd6dd3ef21c31674

MALICIOUS

PDF

83.9 KB Created: 2021-09-04 13:05:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: b31084e193db41fc9765018674c0b33e SHA-1: 42bae68cedf97285756bb8e48e473d8d7c9d02d2 SHA-256: dd6dd3ef21c3167478d1db9372e92f52acb919aa8712f1c41dab5549daec0f88

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate an attempt to exploit user trust for malicious purposes, likely involving the download of further payloads or redirection to phishing sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9911

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://orgue-chantepie.info/FCKeditor/upload/file/zexegolumikire.pdf In PDF document text
- https://himalayanwanderer.com/himalayan/userfiles/files/54533832793.pdfIn PDF document text
- http://goodwynva.com/clients/d/de/de91e19d235d8a3764238851c6b73f99/File/dilovozazerevodurawo.pdfIn PDF document text
- http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c139474f049---misezawesikekagexege.pdfIn PDF document text
- https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/08b48671dafbf3eeeef54b17100d638b/foxijuno.pdfIn PDF document text
- http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b2fdd86b280---watawunaraxidenad.pdfIn PDF document text
- https://personnelcle.com/userfiles/file/rasumubil.pdfIn PDF document text
- http://skipjackpoke.com/ckfinder/userfiles/files/vivarubafetogi.pdfIn PDF document text
- http://vtvxm.vn/userfiles/file/gevajiwimozonebabuzekani.pdfIn PDF document text
- http://vietsonplastic.com/uploads/userfiles/file/femevuxaremixewog.pdfIn PDF document text
- http://domeinbeverdonk.be/assets/files/file/dukibogorebuwixenavavo.pdfIn PDF document text
- https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc30e478c2---62624770612.pdfIn PDF document text
- https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/9b7ab616b43f71349a821d16d305f941/88819301926.pdfIn PDF document text
- https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/ff5006cbd236e5fd83e8bf17fa4fae7c/zutupabojikapewufit.pdfIn PDF document text
- http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072af97ed5f0---4346626467.pdfIn PDF document text
- http://bastola.org/userfiles/file/belobax.pdfIn PDF document text
- http://diysmart.net/userfiles/file/83894579671.pdfIn PDF document text
- https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160e527ec46c9c---14325208806.pdfIn PDF document text
- https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/c0e558b93780bbb87b4ddb5cbe3ef96e/58495169683.pdfIn PDF document text
- https://vandolderskb.com/images/usr/49904145099.pdfIn PDF document text
- http://foodchemsino.com/d/files/33142329831.pdfIn PDF document text
- https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/b4eale6ojuqulhkmvvhlvtaboo/biwosexagurusizumobujovef.pdfIn PDF document text
- https://dbjadow.pl/attachments/file/6197097193.pdfIn PDF document text
- https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160885588e059f---15672188228.pdfIn PDF document text
- http://angelescare.com/userfiles/file/20439153226.pdfIn PDF document text
- https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/6d63c4db536489b9ee2724462e362341/17751783360.pdfIn PDF document text
- http://am-assets.com/aom/magnolia/userfiles/file/67517287250.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=auditing+and+assurance+services+15th+edition+solutions+manual+free+downloadPDF 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_off0000defb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDEFB	17940 bytes
SHA-256: `198a6c671cd40906870abf41350a85269277a9f9f5b5d9cc4d874fe2c703372a`
`font_01_sfnt_off00010e23.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E23	11340 bytes
SHA-256: `0f658689c3f64de1a52cbd6fbe71cd515acb5948e2af6b7a496f2944cafaaa25`
`font_02_sfnt_off0001289c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1289C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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