PDF malware analysis — malicious · a0442edef4368358

MALICIOUS

PDF

80.6 KB Created: 2021-09-04 09:12:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: be150198feca9b2e6ba6b0aa36ce9015 SHA-1: cf73d687977c228d3bcd6a4b7e5af634ec214378 SHA-256: a0442edef436835835d2d711f5d3dde213802e0ae48911bb44f12fb08e2cfe0a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised websites and disposable hosting, 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 point towards a phishing lure designed to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://drafthe.ru/uplcv?utm_term=causes+of+ebola+virus+pdf PDF link annotation
- https://betenenergy.com/sites/default/files/file/pazaguxekudiparo.pdfIn PDF document text
- https://bwawarszawa.pl/upload/file/lezurer.pdfIn PDF document text
- https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/83e65e3b2e2469b98929a8b5f69eaf9d/48519927541.pdfIn PDF document text
- http://curry-box-deluxe.de/userfiles/file/49980453381.pdfIn PDF document text
- https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/3d108125014a366fc81e9f220f7fe088/98523299626.pdfIn PDF document text
- http://aihyang.com/userfiles/file/sujubafutofafabararof.pdfIn PDF document text
- https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bec216493e---xedoxaze.pdfIn PDF document text
- http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0fb4ac1e39---29545371062.pdfIn PDF document text
- http://fence-alarm.com/userfiles/files/13710927179.pdfIn PDF document text
- https://aawyx.com/sites/default/imageuser/file/26772280786.pdfIn PDF document text
- https://cottonweb.net/userfiles/file/vumomiwaxonosebus.pdfIn PDF document text
- http://yavuzselimvakfi.org/resimler/site/files/kekosifilejebabuziroder.pdfIn PDF document text
- http://missinternationalbeauty.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/dibikikajokoterelol.pdfIn PDF document text
- https://scavilecis.it/userfiles/file/nigapanifovinuvitujiguk.pdfIn PDF document text
- http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/18e40a023af9d40da3fd7a97747ae28e/sapotelexetexidilozekopa.pdfIn PDF document text
- http://interel-rus.ru/test/sites/default/files/file/woxixilusaferunubam.pdfIn PDF document text
- http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071b4fd06f69---kugudi.pdfIn PDF document text
- https://nutritie-metabolism-sanatate.ro/app/webroot/files/userfiles/files/20558360447.pdfIn PDF document text
- http://kurier48.pl/files/userfiles/file/bozizowegazisilixidanak.pdfIn PDF document text
- https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/hgjjjttqmsm7t72p6tuvdedj2n/42067077025.pdfIn PDF document text
- https://vannordenvastgoed.nl/userfiles/file/38852659024.pdfIn PDF document text
- http://prvugkh.ru/uploads/files/12241329019.pdfIn PDF document text
- https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e04fa53c134---velujexikoniximimizizeli.pdfIn PDF document text
- http://dieta-plus.pl/userfiles/file/dosegipefaniri.pdfIn PDF document text
- http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160789813ba55b---33260257184.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_off0000d872.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD872	16904 bytes
SHA-256: `c9346cce117fc9f79a610da2f0eeb8b64ad6e9b0c25de56b839fe4f1d7781716`
`font_01_sfnt_off0001040f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1040F	10628 bytes
SHA-256: `14d52c0142611ff997addc4efb638490443e3861dec48c5f619e366051f93e6b`
`font_02_sfnt_off00011c4a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11C4A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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