PDF malware analysis — malicious · fa0d14b7aab176ae

MALICIOUS

PDF

85.1 KB Created: 2021-09-03 06:08:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 4b0f3b3d2ed6b41b5711d0574879262d SHA-1: e220c672b3be2aa93f30344adf5c7e2825b27c75 SHA-256: fa0d14b7aab176ae2299917db0449009170315ad2adadc0e02df7305de19d098

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous links to compromised websites, indicating a phishing or malware distribution campaign. The ClamAV detection and ML classifier strongly suggest malicious intent. The file's structure as a link farm on disposable hosting further supports its role in directing users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9905

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://pistant.ru/uplcv?utm_term=concepto+de+tension+superficial+pdf PDF link annotation
- http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16075248ebb7bd---pisojasafaraf.pdfIn PDF document text
- https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/57ad573615502c58a06f94988f37b4a9/304040649.pdfIn PDF document text
- http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/4108a16280e4065731a0102702303d31/25693088594.pdfIn PDF document text
- https://chrmglobal.com/userfiles/file/xavuwimojabexawotokaxivu.pdfIn PDF document text
- http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca2aa448d8---18470261085.pdfIn PDF document text
- http://fd-health.com/upload/ckeditor/files/pupazafesesez.pdfIn PDF document text
- http://ototavandosemesi.com/resimler/file/xisupumomomudiwokis.pdfIn PDF document text
- https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/33659924bf754cd3fc6fd6124d9e3a48/timofud.pdfIn PDF document text
- https://mmszke.hu/files/file/xazad.pdfIn PDF document text
- http://architettotoma.it/userfiles/files/nikokubanirugufipego.pdfIn PDF document text
- http://solartgaleria.hu/images/file/fimegorofimusadufotubote.pdfIn PDF document text
- http://jrjohnsonfamilyreunion.com/clients/0/09/090f04f22b165063c0e57546eb93b169/File/56230289377.pdfIn PDF document text
- http://srihemkuntschoolint.com/slbdavbatala/userfiles/file/fugigowirozerolojelifa.pdfIn PDF document text
- https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/6813m7g6uo1gu3d8j5lrnlb854/59417465871.pdfIn PDF document text
- https://srilangkapools.com/contents//files/zubup.pdfIn PDF document text
- http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/7f417e69a2d9358c9cc4269baf9c0b97/lavalofaseda.pdfIn PDF document text
- https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/d64d3c2e52c3772fdc6823f404fe273e/73923893046.pdfIn PDF document text
- http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fefd99e025a---xokiginiv.pdfIn PDF document text
- https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/cbf7360441fc0b08940495385c7461a7/21962317943.pdfIn PDF document text
- http://growourworld.com/clients/83159/File/39820635433.pdfIn PDF document text
- https://bibliotheque.ville.deux-montagnes.qc.ca/ckfinder/userfiles/files/80368965162.pdfIn PDF document text
- http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087fbf894cb8---bubelagab.pdfIn PDF document text
- http://vandientuchinhhang.com/upload/files/41263557253.pdfIn PDF document text
- http://patokapugsnkisses.com/clients/61143/File/molapuvajixi.pdfIn PDF document text
- https://blsautomation.com/ckfinder/userfiles/files/72340932321.pdfIn PDF document text
- https://sitpchemcieszyn.pl/_sitpchem/file/56809293772.pdfIn PDF document text
- http://schokoladenbrunnen.de/idata/27625445012.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_off0000e2a8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE2A8	10744 bytes
SHA-256: `ed6d86b3b5d4a0aaf60fb68c54f30a550cb17d49ba0598318e4dc7663386f0ac`
`font_01_sfnt_off0000fb80.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB80	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011392.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11392	19712 bytes
SHA-256: `6e2e3876815cee07fc0301542f31444552759c8d673f10e8f45efa3705554072`

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