Malicious PDF — malware analysis report

Static analysis result for SHA-256 02fbbb37f37f8df2…

MALICIOUS

PDF

145.3 KB Created: 2021-06-18 04:56:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: b6d664579e040e31fd99ab166741995a SHA-1: 47f77471b8d9eedd8f1956ebb8d298e962c7f3d3 SHA-256: 02fbbb37f37f8df23d87271b7a1dcdc256f0262702eb1ae258b21d4e659484ac
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm. The embedded content, though heavily obfuscated, appears to be part of a lure, potentially for phishing or to direct users to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/16092067698616---luzagevi.pdf In PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa03185e87---wamavilonor.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/6a4ce3c1ce5d9f1e92dabdc50e8173c1/9949302675.pdfIn PDF document text
    • http://sakem.org/userfiles/files/fakome.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16091349abd399---7411284640.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1609045a0a66e6---vowurobe.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/599a3cbd9d1890a438f7e41f683f6188/mixoxurezomunipososoz.pdfIn PDF document text
    • http://cukrarnakolbaba.eu/obrazky/files/pogemop.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a23aa4c71c0---fakivovugiruwafat.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5325def35---pelesoxunazoxubaju.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/63048797860a7b5ba3129a.pdfIn PDF document text
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/gukaxetalometabulapa.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e4e72811b---giruxonagirirugakavajefo.pdfIn PDF document text
    • http://jirehenl.com/userfiles/file/131547139157.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=naruto+shippuden+tagalog+full+moviePDF 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000140a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140A1 54060 bytes
SHA-256: 43fd929f20196803e180a639e8310e02a556fef53e02da43dfaa7aa099e212bc
font_01_sfnt_off0001e388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E388 5484 bytes
SHA-256: 7688a1665b13279b2fd9d5a019bb2f163f85a3faaa9569b62a4e57df3eafaf5c
font_02_sfnt_off0001f61b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F61B 13828 bytes
SHA-256: 4c0545957ba8676b9b491ec7672bcd5036c5154fb751b307b6bf31887f008da5
font_03_sfnt_off0002209b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2209B 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7