PDF malware analysis — malicious · 44745c627404929c

MALICIOUS

PDF

84.4 KB Created: 2021-08-17 22:33:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 7cc5fa92b1db52dd4376d3035d914555 SHA-1: f130680f8af605e6d9f892a2191a08ddbbac0c70 SHA-256: 44745c627404929c2986ea9ae6cba3ba3ef9c6b148fde79c43e87f349917fb1b

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, with ClamAV identifying it as a phishing trojan. The document contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution attempt.

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://coretry.ru/uplcv?utm_term=the+comprehensible+classroom+answer+key+cinco+de+mayo PDF link annotation
- https://avenue102.com/uploads/file/64791412513.pdfIn PDF document text
- https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d39000b708---75625273105.pdfIn PDF document text
- https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/56e1edbba2a9db2d7865074bc3c88e95/78456201747.pdfIn PDF document text
- https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/51cc116a5854c3d273069989e3c52441/regepupasifasugesuk.pdfIn PDF document text
- http://eca.or.th/ckfinder/userfiles/files/48707713396.pdfIn PDF document text
- https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/f7f3ca2114832a10557e5a31c81269c0/30890301168.pdfIn PDF document text
- https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/dd4ce3c9c63cb0e4b3e90c59fedf9171/82670159332.pdfIn PDF document text
- https://egokituz.eus/files/galeria/files/romepolepirorowevov.pdfIn PDF document text
- http://arunimaflavours.com/userfiles/file/37561804799.pdfIn PDF document text
- http://dralituncer.net/userfiles/file/45132035119.pdfIn PDF document text
- https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/1ujcr6nrnnbhvls56v7oq0vdd2/74857232959.pdfIn PDF document text
- https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160859c55ea197---kamolanomurinezilol.pdfIn PDF document text
- http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d35138940---2719099551.pdfIn PDF document text
- https://greenvalleykerala.com/ckfinder/userfiles/files/pasuv.pdfIn PDF document text
- http://nextgt.eu/uploads/file/xuxevitidipotot.pdfIn PDF document text
- http://lab4050.com/upload/editor/file/31935412969.pdfIn PDF document text
- https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/4346d8ece0198fb3ccda9392690ac6cc/roferiselofowowusakazab.pdfIn PDF document text
- http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ecb3a5fdac---pidubulu.pdfIn PDF document text
- https://lmbri.com/WYSIWYGImage/file/49546423534.pdfIn PDF document text
- https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a98ae969cf4---9590324622.pdfIn PDF document text
- https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/bde5b82ef0292c7039263783392dd981/4230075702.pdfIn PDF document text
- https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/3b4764f2d97f2b6de5c242240cb3d077/28085276910.pdfIn PDF document text
- https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/a53bff843b88b79345e9c19c756f89a2/39094616887.pdfIn PDF document text
- http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16073d91e01227---rudakijaxofanipasumisexuk.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_off0000e6d4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE6D4	16600 bytes
SHA-256: `b7adc94818c3ccd414de655c1b207aa2fb9b6ce3db8b5d4f049c0c9b1d623a56`
`font_01_sfnt_off000111e7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x111E7	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000129fe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x129FE	11076 bytes
SHA-256: `959cc75b78d9c3728f57e5d3ffaa53494e34d853dd6dcfa136d9b0896f27e102`

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