PDF malware analysis — malicious · 8e347b4a95faa340

MALICIOUS

PDF

90.0 KB Created: 2021-09-05 21:49:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31

MD5: 1d363f5c4e0aa2673ac6375a8f69b14a SHA-1: 92f553dd924e2166f2da5e930c8789073b9afb46 SHA-256: 8e347b4a95faa3404abb709d4ff6db3a48a5a77f52b98f186b96e3001860343d

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress sites, 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 embedded URLs are indicative of a malicious campaign, likely aiming to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9822

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://crysiq.ru/uplcv?utm_term=pakistan+army+structure+pdf PDF link annotation
- https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/e5d55d14ad3610f7e8c42bf122c079e5/desefitoze.pdfIn PDF document text
- https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/4e6a4902392e5ce6fd118ebc4a6d727b/92117383426.pdfIn PDF document text
- http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3030ac957---666099002.pdfIn PDF document text
- https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2b986124c---75658286094.pdfIn PDF document text
- http://cabin4kids.org/clients/0/05/050cd0fff5f75fdfd14851583cc0de74/File/sebuvusogozuv.pdfIn PDF document text
- http://herbwaterthailand.com/userfiles/files/21444351095.pdfIn PDF document text
- http://avision-italia.com/userfiles/files/liretosigudi.pdfIn PDF document text
- https://santa.sg/images/users/00000000/files/56225625793.pdfIn PDF document text
- http://apricomm.com/userData/board/file/82155242411.pdfIn PDF document text
- http://meadescafe.com/userfiles/file/maworanone.pdfIn PDF document text
- http://medi-sen.com/files/files/sidusubotowiduzukabutix.pdfIn PDF document text
- https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/7f4fcc2323c28bdc6e8f1622b5dee30c/sigifijebopewizizukageji.pdfIn PDF document text
- https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612afd8de22f2---tolulizorepovidojotegivin.pdfIn PDF document text
- http://cyc.cz/pictures/clanky/files/fesamoriwap.pdfIn PDF document text
- http://bukharageorgia.com/sites/default/files/file/suxetis.pdfIn PDF document text
- https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa5c444a78d---39694868443.pdfIn PDF document text
- http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606ede6cb044f---72384023175.pdfIn PDF document text
- http://richfield1962.com/clients/4/47/47516dc9824f3897220912ef171c404f/File/53790552647.pdfIn PDF document text
- http://nandeestationery.com/userfiles/files/33033749352.pdfIn PDF document text
- https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/mclf3iivqksg6e5kg2ku6poonm/15295979159.pdfIn PDF document text
- http://frankslawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zajinutimog.pdfIn PDF document text
- https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d2da187a1d---46469248748.pdfIn PDF document text
- http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/161086c6735595---rapujut.pdfIn PDF document text
- https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/fdea496817c1b53c1701de7f38b22931/raxefipesezipofi.pdfIn PDF document text
- https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/2eaf142c3a3e6fefda167fa9b05e0d84/jamudo.pdfIn PDF document text
- https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/8noju4o99s6eoit5jqueu3c9pd/52380776640.pdfIn PDF document text
- https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/aa0db0dbca6e8e4d0f2e380fd1d32b2c/nunemotabigulolesideva.pdfIn PDF document text
- https://basisnomor.com/contents/files/gemaxo.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_off0000f7b0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF7B0	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010fc2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10FC2	18624 bytes
SHA-256: `26001ebb1e9420d9b9c4de22ee2d4f25e702a3181bf6b27076a84b23d4d6c7f7`
`font_02_sfnt_off000140f5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x140F5	10924 bytes
SHA-256: `dbba406ad7e97cb9c95b50b8e3fc84a4c0135be17c24410fd5db7dae7ac3363b`

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