Malicious PDF — malware analysis report

Static analysis result for SHA-256 62ee4882305a6993…

MALICIOUS

PDF

93.7 KB Created: 2021-08-12 10:10:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c13cee389b8e79a02c2c56f0e94b6b5e SHA-1: 2112903b1624f66e5b835ba4f795f9e0345cdbd5 SHA-256: 62ee4882305a69933fde9ac6744c9679d35925a8b82f543e404166272f32d68e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document containing embedded JavaScript, which is a common technique for delivering malicious content. It includes numerous external URIs, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to potentially malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • 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://irlanc.ru/uplcv?utm_term=how+to+scan+on+my+dell+laptop PDF link annotation
    • http://drwatsonsr.com/clients/2/2b/2b9a0cf27321ceab3a47fbd10bf94d34/File/pejekonomebibuwofoke.pdfIn PDF document text
    • https://aydin-elektrik.com/resimler/files/46557341921.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099e573cdcaa---jemisakofejatabofok.pdfIn PDF document text
    • http://garage-fuji.jp/js/upload/files/duzefojalifu.pdfIn PDF document text
    • http://holidayinntorino.com/userfiles/files/13621392244.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fec25671ae---465967750.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b1afc193509---bifogimodoruvegoninijo.pdfIn PDF document text
    • http://banghetretruc.com/media/ftp/file/tulipukeno.pdfIn PDF document text
    • http://jatyn.cn/upfiles/202107/file/1625883194.pdfIn PDF document text
    • https://appchecar.com/ckfinder/userfiles/files/14465022935.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/qt8cmmbahjhj8ic10tqn6het96/rojezovisivinakozek.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/k8s2gdk8hskipso016ldq95q74/bebaxunofifin.pdfIn PDF document text
    • http://lawrence-spruill.com/clients/42275/File/47525028126.pdfIn PDF document text
    • http://fsanaq.com/upload/file/210701113534602438ncisxsgt0uag.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/debexesokumuzinobexagito.pdfIn PDF document text
    • http://exmar.it/foto_fck/file/15145151475.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160871acbeb758---vekivinob.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1609f340457a14---16743548071.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/16083adae4c9cf---fuwovobikoregegerabu.pdfIn PDF document text
    • https://oglethorpeclub.org/~oglethor/UserFiles/file/dewowifuzamiseraxajito.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/c9ab1ebf834f6a619ff41ccbd788569e/23014755716.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/m28o0rj950c1j7frf6jh48je3v/88297645587.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b593250ff02---piragavo.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c277f8a348---daganitemogajawikibowebe.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ad91c7a4214---10084860401.pdfIn PDF document text
    • http://nickels.design/ckfinder/userfiles/files/xomewadoz.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_off00010aa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000122b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B7 10676 bytes
SHA-256: 4733e085deeae2fd2ff1f729e815a2c8785b662a260620fdbfdfe4712279c407
font_02_sfnt_off00013b44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B44 17296 bytes
SHA-256: 695fdc051efaed15083c51c64a91de85d84391ea1eca55eccad6374b99a39c26