Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b60427091ada60e…

MALICIOUS

PDF

88.1 KB Created: 2021-07-04 04:00:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9aad38ac0659b94546b062cc17e97145 SHA-1: aa9a074bd54562d808a60f46f3b7bb232e6ea052 SHA-256: 2b60427091ada60e92669563449f9ec38eb09eac2acbde6a36b28c7335a05138
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised CMS upload directories, indicating a link farm designed to redirect users. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of multiple unknown URLs suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/v1iloidu08utc9ohflhhmle8k1/6532357646.pdf In PDF document text
    • https://unosms.us/userfiles/file/raridawomamoxovimakije.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab56d2347a7---gugevukevewu.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/lotaxoku.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.com/userfiles/file/rofar.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/hin5db27cdg80cu35lk3jahin3/77686632173.pdfIn PDF document text
    • http://meta-min.com/files/gosufutotudugupefozisabib.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/javonuvexogidiwo.pdfIn PDF document text
    • https://jdlpartnerss.com/userfiles/file/76458108054.pdfIn PDF document text
    • https://clickkedai.com/userfiles/file/77937846425.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/39et28rpahs4b6t6re72ut6oq4/38965049564.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/68e4eb8812e23328bec9ef4b31486c59/tufeniwowafulagitu.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d08ccea6c---27555466956.pdfIn PDF document text
    • https://invest.pl/userfiles/file/46896961345.pdfIn PDF document text
    • http://dermaktif.com/imgup/file/86236509594.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/epnar2j1s5ajcl21cmurq5jbrm/digeborajurezoniwanidunez.pdfIn PDF document text
    • https://juhaszautovill.hu/userfiles/file/82883965940.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/e2759a3da2a3bc504e5d99a127cfe6e9/fivujupumelurawinuka.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/b46e810fa6c93f015a11918042c83f02/fizedoxuzaxefaporunipezu.pdfIn PDF document text
    • http://relocationservicesgroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075bfd0b4536---48023881460.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/file/nabituw.pdfIn PDF document text
    • http://abwlanham.com/uploads/files/11617437226.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089f804832ac---10329228744.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1608a30f903614---99857315448.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=using+manual+breast+pump+for+colostrumPDF 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_off0000f326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF326 17124 bytes
SHA-256: 4281f165060d20d787a735a8dc48e460a302c8a18cb8d03d1bb667203d833632
font_01_sfnt_off00011fce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FCE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000137e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137E5 11068 bytes
SHA-256: c5dc6a0323a27ba2c41d9a4f421c8551bec7210539ce8760b255b6c5518b091b