PDF malware analysis — malicious · 0fa9e010d3578fe3

MALICIOUS

PDF

81.8 KB Created: 2021-09-08 03:36:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 88f45f58a3a3c6c285dd1552e8b523d4 SHA-1: 2ddad75eef40decbea223eb0da89df47dd1ede25 SHA-256: 0fa9e010d3578fe3e9c76ca42f7d5e15acb2dee14b213b6dae22a5f8e08eac71

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to compromised CMS upload directories, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing lure designed to trick users into downloading further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16089e2ccd3ac8---13375714788.pdf In PDF document text
- https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ee2df9cafddcaf522cbb1f86369963fa/23264043025.pdfIn PDF document text
- http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606c83914888f---26327480223.pdfIn PDF document text
- http://sarlampa.ru/upload_picture/44968418596.pdfIn PDF document text
- https://atl-50.com/files/file/muwagojevemigoleru.pdfIn PDF document text
- https://jotekonybakterium.hu/userfiles/files/lofene.pdfIn PDF document text
- https://stollerco.com/testingsites/advantage_aviation/assets/media/file/75350589815.pdfIn PDF document text
- http://tokyoto.pl/UserFiles/file/50986812412.pdfIn PDF document text
- https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c46936c43bf---55555769648.pdfIn PDF document text
- http://jump360.co/upload/files/20210730125947.pdfIn PDF document text
- http://jrmhandling.nl/upload/file/gotugutosadatuzupepifab.pdfIn PDF document text
- http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc315c7bb0---sesiniv.pdfIn PDF document text
- http://j1medical.com/uploaded/file/3130983879.pdfIn PDF document text
- https://hunde-katzen.at/soubory/fibigexetidejopenavazu.pdfIn PDF document text
- http://csc0851.com/userfiles/file/20210612192522_iagc3p.pdfIn PDF document text
- http://klawiatury-foliowe.pl/_data/file/84724805431.pdfIn PDF document text
- http://traiteur-ribot.fr/userfiles/file/51802010029.pdfIn PDF document text
- http://bociany.sk/media/file/94161738230.pdfIn PDF document text
- http://haki.vn/uploads/files/29074223219.pdfIn PDF document text
- https://maconlux.lu/userfiles/files/vomesivapolofa.pdfIn PDF document text
- https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/ulrh19eqr48i1ca2sn6p48dt2p/jenij.pdfIn PDF document text
- http://grupopiscis.com/upload/files/90853650170.pdfIn PDF document text
- http://podwierzba.eu/ckfinder/userfiles/files/puvaforulefojedadizivureg.pdfIn PDF document text
- http://bezagsecurity.cz/userfiles/34480371102.pdfIn PDF document text
- https://otelnamore.com/wp-content/plugins/super-forms/uploads/php/files/8882a71d0651a32ac1ef25f74892e502/papekix.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=compustar+pro+t11+installation+manualPDF 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_off0000d988.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD988	10464 bytes
SHA-256: `fc99accc8948da0a76c40286041efccb1dfd3123f290e724ebaa90fc4cfabfca`
`font_01_sfnt_off0000f148.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF148	18488 bytes
SHA-256: `d137f3c690904a9e72fd875378e971f70a92f1e145f08fcb0b896c48d2c09c1d`
`font_02_sfnt_off00012148.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12148	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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