PDF malware analysis — malicious · fce2c80ea5342adf

MALICIOUS

PDF

86.0 KB Created: 2021-09-10 00:33:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: a58f6c222eb4bc61c14e65acaf824335 SHA-1: f23d60934f23543100b53f27b58698aed7162d0b SHA-256: fce2c80ea5342adf5b6f8e1944a52eefea0c271c165b31abf65b9b8430d81e5f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous external URIs and links to compromised CMS uploads, suggesting it functions as a link farm to distribute malicious content or phish users. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution campaign.

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 https://synerhu.ru/uplcv?utm_term=shakti+15+march+2021+full+episode PDF link annotation
- https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1612f6cfdc33b2---semulesizipukatupetus.pdfIn PDF document text
- https://hatinhjobs.com/upload/files/40388105302.pdfIn PDF document text
- http://klhl.com/userfiles/file/fezojosusalikagividus.pdfIn PDF document text
- https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/60672422044.pdfIn PDF document text
- http://geostudio.eu/userfiles/files/gipusilonusiwubapaje.pdfIn PDF document text
- http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/d49f88a9574bc1d73cf6ca8cb4cb1d78/nudetofamipagubax.pdfIn PDF document text
- http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/161303b2111025---91885242856.pdfIn PDF document text
- http://capitaloffice.pl/fotki/file/mugobubineg.pdfIn PDF document text
- http://fsoa.cn/userfiles/file/78209538901.pdfIn PDF document text
- http://jia-longsofa.com/uploadpic/jialong151126/files/202109070209255736.pdfIn PDF document text
- http://baugeraeteverleih.de/benutzerdateien/22314216555.pdfIn PDF document text
- https://adesso-moosburg.de/images/file/64852493454.pdfIn PDF document text
- https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138a4b1d905a---29568756134.pdfIn PDF document text
- https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/942545aede37289f5f7f92615baac229/8162363944.pdfIn PDF document text
- https://investincarpathians.eu/app/webroot/media/files/zumavagunubaf.pdfIn PDF document text
- http://vatlieulamnha.com/media/ftp/file/kagetimoxa.pdfIn PDF document text
- http://polimak.pl/userfiles/file/27601627824.pdfIn PDF document text
- http://diskacme.dk/images/upload/file/tukosukuxos.pdfIn PDF document text
- https://muratay.nl/userfiles/file/85209443405.pdfIn PDF document text
- http://ovstav.cz/app/webroot/files/files/dojoxiz.pdfIn PDF document text
- https://gionggiacam.gagiongvitgiong.com/ckfinder/userfiles/files/zonazixavemabadogofexaj.pdfIn PDF document text
- http://arunimaflavours.com/userfiles/file/jijaniredobuxalugufivi.pdfIn PDF document text
- http://strahyi.ru/images/file/wifutubikisogorozasodefo.pdfIn PDF document text
- http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/19caf2af8ceae13ce57748e6599a47e3/radalovapi.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_off0000e685.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE685	18808 bytes
SHA-256: `093c4e9e1e1eba426da0c167b144020050de80700949d35da0422b094131ef9f`
`font_01_sfnt_off00011762.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11762	11476 bytes
SHA-256: `49396d24127dc937e4eb7cda2b77de5e91f423c02ddae10fb4a3277e68661da7`
`font_02_sfnt_off000132ad.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x132AD	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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