PDF malware analysis — malicious · a2c94331318b7853

MALICIOUS

PDF

82.2 KB Created: 2021-09-02 19:09:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 820a3e54afd5af70c59b8bd7a0fda530 SHA-1: e34f9a595e97774f164aa4ded866d5f869044346 SHA-256: a2c94331318b7853d35ac4b3a3ae1482071ef1b7d9de0508e09ec3c7080839d2

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to compromised sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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://crewmak.ru/uplcv?utm_term=building+planning+and+drawing+kumaraswamy+pdf PDF link annotation
- http://okmarin.ru/userfiles/file/sabuwojag.pdfIn PDF document text
- https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608920e5d6155---33202046340.pdfIn PDF document text
- http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/16071547f2d497---27396999687.pdfIn PDF document text
- https://curryleafharleysvillepa.com/hang/userfiles/files/49647042693.pdfIn PDF document text
- https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/3va171kbpeng5nbstc1lff95m2/8809878304.pdfIn PDF document text
- http://strandedtattoo.com/file/zerobosunadelugekebiwa.pdfIn PDF document text
- https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/co2gdnsuorv9cme4ph1olai877/dakupiparivemowojadomi.pdfIn PDF document text
- http://navigator-nsk.ru/userfiles/file/84984351129.pdfIn PDF document text
- http://deborahmayerlawoffices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/19915300179.pdfIn PDF document text
- https://tavio.ru/files/file/86931972057.pdfIn PDF document text
- http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6421c70c9---9426740035.pdfIn PDF document text
- https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d45fb2a8d1---xasiwofuviguxarobogub.pdfIn PDF document text
- http://eugensa.lt/app/webroot/uploads/userfiles/files/79100184194.pdfIn PDF document text
- https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/baf85d58c6b44f22bfa9a7f5c972bb37/kowadikobep.pdfIn PDF document text
- https://myvideoclasses.com/ci/userfiles/files/50491382059.pdfIn PDF document text
- http://infunplastic.com/d/files/99456349104.pdfIn PDF document text
- http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1606cef79c42fd---pokagele.pdfIn PDF document text
- http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611398edc80af---kozulolej.pdfIn PDF document text
- http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16096e0e880de0---85980987981.pdfIn PDF document text
- http://sun-eko.eu/files/file/pemasisezuxaj.pdfIn PDF document text
- https://robert-zauer.cz/userfiles/file/ruvuna.pdfIn PDF document text
- https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607322e0592d6---76706833515.pdfIn PDF document text
- http://zenithmetals.com/files/68422463809.pdfIn PDF document text
- http://kezmosas.hu/files/file/5978827703.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_off0000dbf6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDBF6	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f40d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF40D	10936 bytes
SHA-256: `eff888787d387c72baf5a551c6576fd9570234b65f72ea7480e9245b258eb07b`
`font_02_sfnt_off00010d32.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10D32	17704 bytes
SHA-256: `fbfc64360205b9316dfcc9196d157c85cec3c0abf0779882daad115d63c427e3`

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