PDF malware analysis — malicious · fb4b55a069b8e81d

MALICIOUS

PDF

86.0 KB Created: 2021-08-15 20:46:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 6b462307e7b03277d0b4bde119a2dd84 SHA-1: ebd1b05f70c2781f04908df78118ea56ea47e616 SHA-256: fb4b55a069b8e81dddb31ca141022a1f56ef2d990a1b78369dfc6bf4b7bf5ddd

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. Static analysis revealed it functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories. These links likely serve as lures for phishing attacks or to distribute further malicious content.

Machine Learning

Nyx PDF Classifier suspicious score 0.3358

Heuristics 5

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
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 http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/4mm9mian9gbauvo1ul4jnb1cn4/wevikata.pdf In PDF document text
- http://nguyenthaotech.com/upload/files/15055780204.pdfIn PDF document text
- https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b62cae9d745---kazeletojiji.pdfIn PDF document text
- https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609a31a871d5f---jikelezodalugurupeb.pdfIn PDF document text
- http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be731b158da---zisexedupojuwukamumupas.pdfIn PDF document text
- http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/13362594045.pdfIn PDF document text
- http://mfcwestenkwartier.nl/beta/userfiles/file/25884275811.pdfIn PDF document text
- https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/1c923cd712b4400a5b95b9da54fe60e1/84584178202.pdfIn PDF document text
- https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/hbed5aap15ln9fkge3bnfpbot6/39041021540.pdfIn PDF document text
- http://zonazero.es/userfiles/file/vuvilesulip.pdfIn PDF document text
- http://agataklimowska.pl/userfiles/file/warotakekuzikogozeza.pdfIn PDF document text
- https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/mibnncugj1ph3q9jkttdfe2u0c/vazutorewedozof.pdfIn PDF document text
- https://umartravel.com/files/51551315769.pdfIn PDF document text
- https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/bcfebf3d80461bc3fc5fdde6dd9a9f9b/tadojibelozajetobafop.pdfIn PDF document text
- https://egca.fr/userfiles/file/fuzopavutuzi.pdfIn PDF document text
- https://airshow-bg.com/file/xikupagokuxaretiti.pdfIn PDF document text
- https://pfhotel.gr/ckfinder/userfiles/files/68162828293.pdfIn PDF document text
- https://betenagro.com/sites/default/files/file/nalarefogip.pdfIn PDF document text
- http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1609b5e3e579eb---66267577930.pdfIn PDF document text
- https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/6aa0654e8d8ce83b8eef2f98dfe9eefe/39010202305.pdfIn PDF document text
- https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077065b39ddd---3593192304.pdfIn PDF document text
- https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8cc996b380---88447520046.pdfIn PDF document text
- https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608b88a5e2309---27498638206.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+outline+romance+novelPDF link annotation
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00012289.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12289	10468 bytes
SHA-256: `f8749a5d978b08f301cd4fcffd98d54d9f6d92de19cd99155628229dde47def0`
`font_01_sfnt_off00013a48.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13A48	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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