PDF malware analysis — malicious · 46bcd26e9ac57cd2

MALICIOUS

PDF

72.8 KB Created: 2021-06-27 10:13:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: c55c9a305354a9a53809244e47e62589 SHA-1: 8d542cf15613a411f0ee73bc257ef4190dfcf11f SHA-256: 46bcd26e9ac57cd2c31ad4ecbee9f4f5065882b875fa0125f854d505b5cca1b9

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs that point to external websites, many of which appear to be hosted on compromised WordPress sites. The primary attack pattern involves luring users to click these links, potentially leading to further compromise.

Machine Learning

Nyx PDF Classifier malicious score 0.9893

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://chcial.ru/uplcv?utm_term=taper+and+tap PDF link annotation
- http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160855e8e378e3---47974395451.pdfIn PDF document text
- https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/554000ad35ffa3508b3d9adc49112950/89321119172.pdfIn PDF document text
- https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/fcad966c37afced41543808f6369fc18/gegib.pdfIn PDF document text
- https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/0mu1jhfdv4uski44gb6n0e7tn8/donefonudizezowopujet.pdfIn PDF document text
- http://curry-box-deluxe.de/userfiles/file/84326914484.pdfIn PDF document text
- https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/0b939756fcbbb3d7b7cbc67b6ea2248d/13969999955.pdfIn PDF document text
- https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16082d5e6d3a9a---8577011138.pdfIn PDF document text
- http://perilatomsk.ru/ckfinder/userfiles/files/wipilorapaxeluvetili.pdfIn PDF document text
- http://aeronautike.com/userfiles/file/kumawixakisakirokamex.pdfIn PDF document text
- https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf1550b083---47510873886.pdfIn PDF document text
- http://soepcentrale-dekeyser.be/userfiles/file/xaverosanivamirakivexe.pdfIn PDF document text
- http://cngwalk.com/fckeditor/userfiles/image/90031272235.pdfIn PDF document text
- https://syteq-pro.com/userfiles/file/joramar.pdfIn PDF document text
- http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072aedfa71e6---87934515621.pdfIn PDF document text
- https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/faf25ea49521327b45401536ab502d59/bedofirulofudira.pdfIn PDF document text
- http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4dc9bd2ce---73486223601.pdfIn PDF document text
- http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160754e9d6c250---dixaximomereguzeligewe.pdfIn PDF document text
- http://dungcucaytrong.com/images/files/jozugewazaw.pdfIn PDF document text
- http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078ce660896c---64182531409.pdfIn PDF document text
- http://filatelianumismaticaumbra.it/userfiles/file/jovirivonajamo.pdfIn PDF document text
- http://cukierniabrzezinski.pl/www/artizam/fck/file/kisor.pdfIn PDF document text
- https://assignmentmart.com/ckfinder/userfiles/files/guloromefozub.pdfIn PDF document text
- http://nguyenquangcomputer.com/upload/ck/files/zoxugusegikofivibomasamu.pdfIn PDF document text
- https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/dmi49m5lj1d813k81uiftq3t8j/63119797422.pdfIn PDF document text
- https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160aaeb57e841e---xesodataxerenekirobofoka.pdfIn PDF document text
- http://babamoleskine.com/files/file/besupujenemirikuvaku.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_off0000bd10.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBD10	9924 bytes
SHA-256: `e19f582e3cabca71ca17214871cfc6a73457e0a1bbf15a4bf9df7bd76ff6a496`
`font_01_sfnt_off0000d30b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD30B	16276 bytes
SHA-256: `54ea1277aba29730213cc2186341ec1725d0549dc3f54bbc7a2a4d69c28366ac`
`font_02_sfnt_off0000fd5a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD5A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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