Malicious PDF — malware analysis report

Static analysis result for SHA-256 30f960c4cfee52b4…

MALICIOUS

PDF

93.9 KB Created: 2021-07-29 13:36:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4a65104f951a80d575fd1d9d4023afac SHA-1: 495351d751e04c4889ee38bbdab6781e22c01365 SHA-256: 30f960c4cfee52b43815494c60384bec1de812af4bc23109101ec0e0bc5e8a41
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is a common technique for executing malicious code or redirecting users. The file also features a large number of external URLs, many of which point to compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=twilight+new+moon+jacob+quotes PDF link annotation
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607caf2560f93---34369751498.pdfIn PDF document text
    • http://zge-led.com/luodan/images/userfiles/file/35261640429.pdfIn PDF document text
    • https://unibel.pl/pliki/upload/file/98253633330.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/f242eec821a68984c2e13c30b30ba04d/fafivupinotibuxelu.pdfIn PDF document text
    • https://dnmpaint.com/sdcc/images/file/95435012269.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160775ace5a1f1---pobebesop.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/17862ed6c6b2c3853a8d50127afd2b6d/73597531353.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/20217272210522323.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ff5b196d6---sevat.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/2156754641.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1609c86f5377f5---33256794114.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/d0qaoeg2gqcu9a4trq5k93ot22/22277733242.pdfIn PDF document text
    • http://rafaelstore.ru/upload/files/jonubaxa.pdfIn PDF document text
    • http://garage-fuji.jp/js/upload/files/13056020509.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16086bcb310acc---warijojanemufanod.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b340e6d0773---xukapotolapapemisidaxosax.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607115a8d149b---zubiza.pdfIn PDF document text
    • http://eska-lift.ru/userfiles/file/bipulogewa.pdfIn PDF document text
    • http://blueyee.com/upload/file/241507019856.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090340bf3d2b---fasew.pdfIn PDF document text
    • https://ourlady-schools2.com/userfiles/files/sanodazevuvakikelolefi.pdfIn PDF document text
    • http://kimandyoo.com/userfiles/file/degafifewilonepu.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b3cd6674a5c---21553426317.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa31452a3c---sanepupomonobesinagelure.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/k71tk5kq5apopadudldhk3k6nm/25558366267.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.

FilenameKindSourceSize
font_00_sfnt_off00010b52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B52 17016 bytes
SHA-256: b4cbb3d3900829487a0523924fed18245565d07e73f7bb0f92fce6f7183e99df
font_01_sfnt_off00013787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13787 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014f9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F9E 11144 bytes
SHA-256: dcb6f4c71a9bc5a51edda5ae1e4a0ade9c52e1b51f3178fdc95a8f8940c46b93