PDF malware analysis — malicious · f42ef04c91f66aba

MALICIOUS

PDF

88.5 KB Created: 2021-07-15 23:19:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: efbafed57d90cd5b393fea0c8ec9bd8b SHA-1: ad93c9babffec60b6671a48146bce8748254644a SHA-256: f42ef04c91f66abac4fd2e160bcda590142e2f50887d6f0d9a4c6399e142eb9d

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm. Multiple heuristics indicate the PDF contains numerous links pointing to compromised WordPress upload directories, suggesting an attempt to distribute malicious content or phish users. While no scripts were directly extracted, the nature of the links and the detection suggest a potential for further malicious activity, possibly involving embedded JavaScript or external payloads.

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://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a95ba1e0699---2041827458.pdf In PDF document text
- https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/000e11a6a2a0674f1a31c38e2f440d14/pagasubefifilawanuxopuzi.pdfIn PDF document text
- https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/f746e881e56498ef7cb21b66986147ba/jawegekuvogadujunujasetur.pdfIn PDF document text
- http://wallawallahighschool1968.org/clients/75819/File/debujojizudupu.pdfIn PDF document text
- https://cezartravel.hu/userfiles/file/rikuzuborukisige.pdfIn PDF document text
- https://acavacecio.it/userfiles/files/27249359076.pdfIn PDF document text
- https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ffc0d90f5b---57759098696.pdfIn PDF document text
- https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d864cb818b8---28775168362.pdfIn PDF document text
- http://entone.es/wp-content/plugins/super-forms/uploads/php/files/491913293c4b8a080653d076d3f847cd/64772691803.pdfIn PDF document text
- http://kingnature.ru/files/files/46820171007.pdfIn PDF document text
- https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/787e18e8cc879f218c0559b289abdf36/mowinowuzigerekibebe.pdfIn PDF document text
- http://banghaija.com/userfiles/file/boduvaroludo.pdfIn PDF document text
- https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d920bbe3dc---47768079098.pdfIn PDF document text
- https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e669af1515---59680044064.pdfIn PDF document text
- http://kojeneckezbozi.eu/userfiles/file/sirubesegotazovelafowize.pdfIn PDF document text
- http://irinka.org/ckfinder/userfiles/files/45882337898.pdfIn PDF document text
- https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/66c633475df9a0d617b4f695e9ec650a/69365228982.pdfIn PDF document text
- https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16093d09b86866---wakovaponozekutenavawurug.pdfIn PDF document text
- http://mfcwestenkwartier.nl/beta/userfiles/file/76594657517.pdfIn PDF document text
- http://jar-ted.pl/file/50443882206.pdfIn PDF document text
- https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/2a01b62dac5df92fc20d7faef93663a1/jusab.pdfIn PDF document text
- https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6a270e35d0---36425113883.pdfIn PDF document text
- http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160987c1600031---68853318816.pdfIn PDF document text
- https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607609e8b2341---judugaxurepus.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=laughter+and+tearsPDF 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_off0000f8ea.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF8EA	17208 bytes
SHA-256: `5a49cb0ecf2a2b6e50ab2a4e482640e83657ad11113e13882de84955a85972eb`
`font_01_sfnt_off000125d1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x125D1	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013de8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13DE8	10324 bytes
SHA-256: `b1f0e659efdfa48704960a475d16a6599bbb031eaa6f55371f4fe5133a9d6067`

Open this report in the interactive analyzer, or submit your own file for analysis.