PDF malware analysis — malicious · 8383a4e49cfc9f10

MALICIOUS

PDF

87.0 KB Created: 2021-07-17 01:05:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: f5664fd2d1f808f7b474ac2b2039d1b9 SHA-1: eb096baa890883e4e5e857b80b72bd91bf43958b SHA-256: 8383a4e49cfc9f10f56790f84585f9f5e60f0a058b642ccc4a429e2ffa646ce3

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm pointing to numerous URLs, many of which are hosted on compromised WordPress sites, suggesting an attempt to distribute malicious content or conduct phishing. The ML_NYX_PDF_MALICIOUS and CLAMAV_DETECTION heuristics strongly indicate malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a86d58b55b1---rufozesogesebilepej.pdf In PDF document text
- https://batikatravels.com/userfiles/file/zevurozoridije.pdfIn PDF document text
- http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8cfcb0c3e9---viregidivaxikutezodalopu.pdfIn PDF document text
- http://abwlanham.com/uploads/files/bolulexajaxavoxipe.pdfIn PDF document text
- http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a74f3b72669---55474574717.pdfIn PDF document text
- https://cardion.dk/gfx/fckimages/file/78839911623.pdfIn PDF document text
- http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608cf142f2875---dapixironinovisofer.pdfIn PDF document text
- https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/38788sj14qu2iqk89hiab1c0ep/lukotujenugesajujesen.pdfIn PDF document text
- https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/2d77qbka564co8qknriovu2jju/kaporuvomafebowupafiz.pdfIn PDF document text
- http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab97df34832---jupifojigijawogemapupov.pdfIn PDF document text
- http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160918a6f494be---78860032479.pdfIn PDF document text
- https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/010a25a681b43833915af83f37ea86e8/sonopexujir.pdfIn PDF document text
- https://pnp-studio.com/fckeditorfiles/file/zitanuwowarividozuravezu.pdfIn PDF document text
- https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/e0k26f44d3561mr573ds1qn874/soloxe.pdfIn PDF document text
- http://baodieptailor.com/uploads/2021-07-14/images/files/losuzivewizasesijupode.pdfIn PDF document text
- https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160883f0ad69e7---wonudipewamuzifajev.pdfIn PDF document text
- http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/9485269072fb0acf004f3680fa460ebe/85668772615.pdfIn PDF document text
- http://okzawidow.pl/img/upload/files/xomofixasotakoxugow.pdfIn PDF document text
- http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2aee636224---kepelegumobul.pdfIn PDF document text
- http://beiwendq.com//data/attachment/file/wogitoruxadojowudafi.pdfIn PDF document text
- https://oriental-kitchens.com/userfiles/files/99469450861.pdfIn PDF document text
- https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/93d762ah02phek5d8d443kf4q3/suzuzavezivifidarugag.pdfIn PDF document text
- https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/291199657f492867156920583b349146/ferajepekomimuwuwe.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+stop+parental+alienationPDF link annotation
- http://s292376414.onlinehome.fr/datas/imgmail/file/bipitibigigigajul.pdfIn PDF document text
- 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_off0000f22c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF22C	10324 bytes
SHA-256: `c0c267690e129cf476234ac1ac9f6172e60eab9ac0588581929d359f485f067d`
`font_01_sfnt_off0001099a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1099A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000121ac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x121AC	17264 bytes
SHA-256: `ed365bda474f43ebe8b1229e3dd11ebad88e2188eb03485acd42f57097700667`

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