PDF malware analysis — malicious · a1c7ce6c8723ece4

MALICIOUS

PDF

87.3 KB Created: 2021-06-28 05:55:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 66d52955f8c913268a6628cc4256af90 SHA-1: 52d8ae5ea8c3ccb2e899693123ce17574bacae22 SHA-256: a1c7ce6c8723ece45363b01e550798819a7970872895e6e2f75f3a85bb90ff66

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous links to external websites, many of which appear to be hosted on compromised WordPress installations or disposable domains, suggesting a phishing or malware distribution campaign. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

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://irlanc.ru/uplcv?utm_term=cover+letter+for+dental+assistant+traineeship+no+experience PDF link annotation
- https://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/o9mbidq37j2dnd1fb7hqiujfj4/15898975501.pdfIn PDF document text
- http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ae16e5dcc04---65756454719.pdfIn PDF document text
- http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/16090ac357a09a---kimusudavoxejukod.pdfIn PDF document text
- https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/795f4f7bf1ae0c8f69c2ec789022cf1e/pabobemusuxadezuxozu.pdfIn PDF document text
- http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a1bc4ab1aa5---2774749787.pdfIn PDF document text
- https://thediamangroup.com/_images/files/momakafe.pdfIn PDF document text
- https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/b7e7c4f4b31e46e302375e6b3e888861/4741186966.pdfIn PDF document text
- https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd5e6dd0c1f---29044776979.pdfIn PDF document text
- http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609af7d2bad3f---20526924132.pdfIn PDF document text
- http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160709c4f62823---96439750565.pdfIn PDF document text
- https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16085302bce977---mosojativipikekifapad.pdfIn PDF document text
- http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/gj4hk2gkqgnnrhp9kdu9cp5vn7/nefomevatupemo.pdfIn PDF document text
- http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d12ee15c9a---noxiragarigijefedonatari.pdfIn PDF document text
- https://samarpanbharat.org/trila/userfiles/file/32850363488.pdfIn PDF document text
- http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070a64d66be1---28314405264.pdfIn PDF document text
- http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/16088572db689c---7636939495.pdfIn PDF document text
- https://roweryelectra.eu/app/webroot/uploads/file/16199640700222.pdfIn PDF document text
- https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/fsumtn826hanm9vh8q967dered/pegojiredizakoxuvepuz.pdfIn PDF document text
- https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/b6etnvlvc05fd0fvhf61qmh0mc/66427018351.pdfIn PDF document text
- http://edgecs.net/documents/24228926738.pdfIn PDF document text
- https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/43738b748b84dac08d09d63354e85713/52155014052.pdfIn PDF document text
- http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160cddf2ac98ed---83008950168.pdfIn PDF document text
- http://alnoorcity.com/userfiles/file/16721037573.pdfIn PDF document text
- http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/600d51f098341b6283c34154cb798ad0/mawerakukisinebedeto.pdfIn PDF document text
- https://klcmekatronik.com/ckfinder/userfiles/files/pagufewirudugalepi.pdfIn PDF document text
- http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/dc5d8ab4ccb201868b0901357359657c/66504175734.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_off0000efc0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFC0	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000107d2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x107D2	17040 bytes
SHA-256: `448ce5d453434437e111accdda08da224855821d171f1f67eca5a66c10a19a59`
`font_02_sfnt_off00013404.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13404	10916 bytes
SHA-256: `0e5cb7c136dce2539b88325968b7fbad7a2ae67f77d0656a33642254a2bc8245`

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