PDF malware analysis — malicious · a1f3fc98b8dd2c51

MALICIOUS

PDF

84.2 KB Created: 2021-07-02 16:29:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: 80899a8db0024dc0bbc4c5f4ae259b28 SHA-1: f2dea1a5a77079931db546cb2e7e544fef8af982 SHA-256: a1f3fc98b8dd2c514d94b5e1ee16f144b175ac968e37f79e3dc72b9582958a6e

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous embedded URLs that point to compromised WordPress sites and other disposable hosting, suggesting it functions as a link farm to distribute malicious content. No scripts were extracted, but the presence of multiple external URIs indicates an attempt to redirect the user to potentially harmful websites.

Machine Learning

Nyx PDF Classifier malicious score 0.9955

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://oniceh.ru/uplcv?utm_term=federal+direct+subsidized+vs+unsubsidized PDF link annotation
- https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/ba6299fc448b388a5d14f4d4ae12d203/13234396289.pdfIn PDF document text
- https://camping-du-lac-dijon.com/fichiers/sezopukilewinosi.pdfIn PDF document text
- https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abd54a02750---vufipemalogi.pdfIn PDF document text
- https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd11819537---71608212692.pdfIn PDF document text
- https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609890cac1141---taxurekazalisusizuv.pdfIn PDF document text
- http://lab4050.com/upload/editor/file/mujumiwituxoxo.pdfIn PDF document text
- https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c12d0ace6---wonomezerarox.pdfIn PDF document text
- https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/99d1b217a12610a7acc88438117d14e6/xufutolisopamo.pdfIn PDF document text
- http://libertyquad72.fr/userfiles/file/ribajinusilekolomokekavoz.pdfIn PDF document text
- https://lemanssrl.it/file/lidafatunimixorababorin.pdfIn PDF document text
- https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/7c1d9d3d0ab6b2b1f1079b19bcc32b66/rafozigududosemib.pdfIn PDF document text
- https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba806b5829d---57183841628.pdfIn PDF document text
- http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607545d04c647---2896562863.pdfIn PDF document text
- http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c18c97bafad---tipegebaresi.pdfIn PDF document text
- http://t-p-fortune.com/userfiles/file/16282870749.pdfIn PDF document text
- https://angkorphotographyguide.com/userfiles/file/52323553723.pdfIn PDF document text
- http://poltinik.ru/userfiles/file/25771937247.pdfIn PDF document text
- http://rdmsrl.it/userfiles/files/jododudajexebubanaxudixer.pdfIn PDF document text
- http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160be67584dc4e---27930631109.pdfIn PDF document text
- http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd7dc4210d---2597071914.pdfIn PDF document text
- https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//dotalezokawini.pdfIn PDF document text
- https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/539a096cf11d416a3b62ae676439c627/rawijuzoka.pdfIn PDF document text
- https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ae1276d49b---88460998097.pdfIn PDF document text
- https://magyar-logyogyasz.hu/fileok/file/30410989852.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_off0000e774.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE774	10584 bytes
SHA-256: `9669827b42f88db92b23f4e7a53a6dd2c70c1733dfae46364b3cebb3fbf3be4d`
`font_01_sfnt_off0000ffbf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFFBF	16980 bytes
SHA-256: `66ad4635704dbfeb0b020c1cb7b26ec2754c47d2efe3275c8d723df0a028565c`
`font_02_sfnt_off00012b73.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12B73	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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