Malicious PDF — malware analysis report

Static analysis result for SHA-256 180b6a7996405a20…

MALICIOUS

PDF

80.7 KB Created: 2021-09-12 01:52:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f33e6d3b47d4b4595a26290c4a2aac79 SHA-1: d89bb398469f7007e505e4fa5ed12e4cb18c709c SHA-256: 180b6a7996405a203bcd161258c23cdc94e0dcbd0d6fd61a8e3dbf21cda45ab5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, indicating a phishing or scam lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://hrmconsulting.biz/upload/files/41715219403.pdf In PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/831f3ed714900f0a4f61a30e366eee82/76153368717.pdfIn PDF document text
    • https://kingcarmotorista.net/uploads/files/41782424039.pdfIn PDF document text
    • https://www.frontiermea.com/sites/all/libraries/ckfinder/userfiles/files/1696562530.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137a5b26d58e---80644073546.pdfIn PDF document text
    • http://bixenony.com/userfiles/files/50991868135.pdfIn PDF document text
    • http://salman-is.com/userfiles/file/37729454519.pdfIn PDF document text
    • https://aymexco.ro/ckfinder/userfiles/files/bekafu.pdfIn PDF document text
    • https://hattshopping.com/admin/assets/images/ckfiles/81435817764.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/71aa1b4f8c0ffb6f66c0e42f0ca30cd8/lipawevojakex.pdfIn PDF document text
    • http://sakra.sk/storage/file/87087733912.pdfIn PDF document text
    • https://biholka.cz/uploades/userfiles/file/57005397475.pdfIn PDF document text
    • http://giovanniseneca.eu/userfiles/files/zuwewofo.pdfIn PDF document text
    • https://rmp-familienanzeigen.de/cms/files/36181479154.pdfIn PDF document text
    • http://agrobud.net/uploaded/file/6510903237.pdfIn PDF document text
    • https://movie2book.com/userfiles/file/patuge.pdfIn PDF document text
    • https://tanhoaphat.vn/userfiles/file/fogod.pdfIn PDF document text
    • http://xn----1-6cdapb2bdyqawnpcindqfc.xn--p1ai/media/file/gusiluputa.pdfIn PDF document text
    • http://sbnjl.com/userfiles/files/55666890456.pdfIn PDF document text
    • http://systempro.kr/userData/board/file/25779951793.pdfIn PDF document text
    • https://crownprolaw.com/userfiles/Proj_Name/files/dedamuzikejus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=v+bucks+generator+hackPDF link annotation
    • 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_off0000d724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD724 17680 bytes
SHA-256: 00c9944202d9d45098a7e4fd0693c339a803ae0ef945fae81740c586a44c85a7
font_01_sfnt_off00010529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10529 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D40 10672 bytes
SHA-256: 97d2be92b650350df69f7d6e784052a6417eb2ef4f7f7c3fe07525c3e82b4d88