PDF malware analysis — malicious · 0aaecee81c4311b6

MALICIOUS

PDF

75.0 KB Created: 2021-07-07 12:07:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23

MD5: cce00b8e1752f1b790651c11f82f12d1 SHA-1: e2d6575284bf9ffb5b6854dcae8c25f4a865c206 SHA-256: 0aaecee81c4311b6291825baaafbcf780dd72b2293936987d1daca1c99b81ae5

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, pointing to numerous compromised WordPress sites. The embedded URLs suggest a phishing or malware distribution scheme, likely initiated via a spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9840

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 https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/507adc4e4edde40da5028898a7ac5c46/89948250423.pdf In PDF document text
- https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/84696066c58fb66cbe678cd19a1bbb7d/tufiganizotafoniwu.pdfIn PDF document text
- https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/vuufgs5okrbhqduagdsjdt58i4/jewiwurupusakavasuwawa.pdfIn PDF document text
- https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/00d6a04719eb0d8e4fa1c1fca97a9125/6555011193.pdfIn PDF document text
- http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090ca729beda---45636030763.pdfIn PDF document text
- https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e48ff723e9f---42564819886.pdfIn PDF document text
- https://pelicanfinancialnetwork.net/ckfinder/userfiles/files/84122729942.pdfIn PDF document text
- http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1609a66b75109e---93576884308.pdfIn PDF document text
- https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c097f04e37b---miwijemesavudopevu.pdfIn PDF document text
- http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/13ab99eecba50dfed39fa93011c61bae/18668440415.pdfIn PDF document text
- http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/0ac626494209c2ebe21d45169de38fd1/zubodejalosazaguz.pdfIn PDF document text
- https://havanic.com/cache/fck_files/file/58174356007.pdfIn PDF document text
- http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4dcdfa5694---57932754880.pdfIn PDF document text
- https://indobaliart.com/sitefiles/file/7808124483.pdfIn PDF document text
- http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a78d8fb84f0---gatisapanapulokaxo.pdfIn PDF document text
- https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16094786b44692---72250511250.pdfIn PDF document text
- http://chothuexehochiminh.com/userfiles/file/23945585862.pdfIn PDF document text
- http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b8add683e4---gunolokeruba.pdfIn PDF document text
- https://opuntia.eu/wp-content/plugins/super-forms/uploads/php/files/36f3a32581249cf739ae20d031a281b7/zovinemububu.pdfIn PDF document text
- http://sbhs1967.com/clients/8/89/8985ce50e7417da620f75e2af787291b/File/56004454331.pdfIn PDF document text
- https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/ad13907bc432a2ca7a9378706f741b63/84543856101.pdfIn PDF document text
- https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/79266ccc67444d91d7c48715b990e4b3/68573821046.pdfIn PDF document text
- http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160878c9ed1a6f---94893720789.pdfIn PDF document text
- http://indyztyle.com/ckfinder/userfiles/files/68355591842.pdfIn PDF document text
- https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608274b2366ca---tibawekuzikexixi.pdfIn PDF document text
- http://randygordonlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wijotufimenusudimeluzup.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=usd+to+aed+todayPDF 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_off0000c41e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC41E	10020 bytes
SHA-256: `6839f1b8fcb3813bac3b9149c226f8c1b8d91b71a634d8e15c4f83c0d8f43037`
`font_01_sfnt_off0000da7f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDA7F	16912 bytes
SHA-256: `8a4aacffd96a76ebb5da9532af92a71ce9da56e159c9c4d0c8ed1e425354ff37`
`font_02_sfnt_off000106ce.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x106CE	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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