Malicious PDF — malware analysis report

Static analysis result for SHA-256 2034cb56bb75a0c7…

MALICIOUS

PDF

85.8 KB Created: 2021-07-10 11:04:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 479c5090a6c1e2bd36c0a9d6d57ea6b3 SHA-1: f192dacc0f0e9ab9b4339644abbf61f5fec3dd75 SHA-256: 2034cb56bb75a0c7dfe535d92033fc0db41847ca2db62c87d18fb42c8deb7363
156 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. Static analysis revealed it functions as a link farm, with numerous URLs pointing to compromised websites and disposable hosting. These links are likely intended to lure users into downloading further malware or engaging in phishing activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • 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.
  • 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://interiorconsignments.com/media/file/8291662866.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ac274611b---lewenogipijegamizajowota.pdf
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ae610b076b1---47951478806.pdf
    • http://artin-intranet.com/ckupload/files/69136116417.pdf
    • http://casaperferiesantamariagoretti.com/writable/public/userfiles/file/waxalakizalinamigubelave.pdf
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/t4qucdjfb7qvccqjbbt45l6l62/11642658203.pdf
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/1257bb47a73b852b571f5f80a57869fe/rasaxafunolobo.pdf
    • http://dh-cell.com/ckfinder/userfiles/files/bunijiwejejoruzakatutow.pdf
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e8acbe941---14412007184.pdf
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/r95bo0iq21u67ps0722n9j0rde/vuwejisus.pdf
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/qg3d0jbn1nt2070c7cm0r004bm/zaxoraf.pdf
    • https://eprobatdz.com/ckfinder/userfiles/files/mobexidejewevotobumetix.pdf
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b42b26efac---mirozovetogafumu.pdf
    • http://polymer-optix.de/userfiles/file/8252445894.pdf
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160721ee6763a9---4225227274.pdf
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/0a9dce66210ad6396ca1e1a0f4416a87/zamikojazuwamos.pdf
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/96203675812.pdf
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c989b143b0f---41151726273.pdf
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/ug9c51q2uo4vd2960qi6aorj41/99149947448.pdf
    • http://ferrogep99.hu/static/media/file/sisumokiviwiruki.pdf
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0655da6d6b---97646557755.pdf
    • http://nhs1966reunion.com/clients/1/1c/1ca8f1639ee69cd7806809ed3bcda9bb/File/79560337088.pdf
    • http://ohana1bbq.com/uploads/files/43837256827.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=1st+class+stamp+limits
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee8e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8E 16792 bytes
font_01_sfnt_off000106a0.bin
129cc955e24a7d9c66140f2a43b32ed3dd87b4b059f59efeaed850eb8d7dac33
pdf-font-stream PDF embedded font (sfnt) at offset 0x106A0 17168 bytes
font_02_sfnt_off0001339e.bin
38e50086a1860483e3ddf92f60cc91b859e13c328721413a200a581fdba57946
pdf-font-stream PDF embedded font (sfnt) at offset 0x1339E 10032 bytes