Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d2c5ab16d322f28…

MALICIOUS

PDF

100.5 KB Created: 2021-09-13 11:28:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6039cc0b2d53748d4d1bc58ee2b41386 SHA-1: a2265a6c81c9bc9124a6591beb052e8ae53c10fd SHA-256: 1d2c5ab16d322f28340ec94a48bce8d9a7b3d2b4d842b2c552e34e8ae78a2eae
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The sample also exhibits characteristics of a link farm, with numerous URLs pointing to external resources, some of which are hosted on compromised CMS upload storage. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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 http://wildzipper.com/clients/wildzipper/userfiles/file/nujojil.pdf In PDF document text
    • https://aldurra.ly/images-editeur/img/file/47044953457.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/161300bd2b3876---56016459988.pdfIn PDF document text
    • http://www.kizkulesikizogrenciyurdu.com/public/ckfinderuploads/files/tanipikif.pdfIn PDF document text
    • https://excellencetogether.com/img/files/file/zafijuzuziduvape.pdfIn PDF document text
    • https://nevisnews.com/userfiles/42074471270.pdfIn PDF document text
    • https://ropaalmayoreo.com/images/userfiles/file/54873980038.pdfIn PDF document text
    • http://epoxidice.ro/mm/file/jewerirezonugat.pdfIn PDF document text
    • http://djapm.com/userfiles/file/55616016504.pdfIn PDF document text
    • http://balmybnb.com/t/tutorfirm/uploads/ck/files/34134372990.pdfIn PDF document text
    • https://petpetmates.com/files/editor/file/bokukifexebel.pdfIn PDF document text
    • https://muzpony.de/obrazki/file/14977538667.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612e9c0eaba8c---28173190305.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/45987659061.pdfIn PDF document text
    • https://konferencii.ru/js/ckfinder/userfiles/files/pewusoderavesilizanak.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/ipikusurawut.pdfIn PDF document text
    • http://digjamaica.com/app/webroot/files/60368605007.pdfIn PDF document text
    • http://innobiztour.com/FileData/ckfinder/files/20210902_E8EAF7E398F80719.pdfIn PDF document text
    • http://bluelakehomestay.com/uploads/image/files/gebonusuv.pdfIn PDF document text
    • http://plise.org/userfiles/file/fugetunilijademibofojipa.pdfIn PDF document text
    • http://milwaukee.center/userfiles/file/rapebawerasaredugikiv.pdfIn PDF document text
    • https://sharmtocairo.com/userfiles/files/nonuveropopewowazolofa.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e17d10cace---pomexufivegovaxuwojoju.pdfIn PDF document text
    • http://hhoasis.org/app/webroot/img/fck/file/39863843995.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=table+generator+latexPDF 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_off0001200c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1200C 19812 bytes
SHA-256: e561e2cc271542fe29628d535744f4d4ce80041fd7ea8cf8db1a92032e02ace3
font_01_sfnt_off00015538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15538 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016d4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D4F 10228 bytes
SHA-256: c59507619d9a084cf24ed2990ee99c7c148f7e177bb00853e07b04a4f110ca02

Open this report in the interactive analyzer, or submit your own file for analysis.