Malicious PDF — malware analysis report

Static analysis result for SHA-256 3be14ef8c571f0b7…

MALICIOUS

PDF

72.8 KB Created: 2021-08-06 07:29:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 879300ecff76ca880777c69a0dbb92ea SHA-1: 48a0a3f0423dc8d6d3ca633e62d9797d55df570e SHA-256: 3be14ef8c571f0b7641b4b23a8b6b34fe008ca8d4d9593f63769959fec62ec82
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a PDF link farm pointing to compromised WordPress upload storage and other potentially malicious URLs. The document body is unreadable, but the presence of numerous links suggests a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160767d6d0b8b9---5730343707.pdf In PDF document text
    • http://casier-a-bouteilles.com/file/15050415371.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160acf417aa377---52050205583.pdfIn PDF document text
    • http://bobiniauto.com/userfiles/file/lejerekineral.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/50a54fca5345cdbe3a2239fb8755c922/59722543457.pdfIn PDF document text
    • https://mttrasportisrl.it/dati/upload/file/49522235259.pdfIn PDF document text
    • https://aymfly.com/aym_image/files/19154583782.pdfIn PDF document text
    • http://katachizu.com/img/news/files/xitumokifereba.pdfIn PDF document text
    • http://ambulanceservice.pl/userfiles/file/tuwisefurapez.pdfIn PDF document text
    • https://alusol-kw.com/ckfinder/userfiles/files/98491491659.pdfIn PDF document text
    • http://syarmarka.ru/userfiles/files/lemojunugelumitid.pdfIn PDF document text
    • http://www.pavimentosyreformasferlu.es/ckfinder/userfiles/files/novosupoxamufosatesegowem.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/28924038292.pdfIn PDF document text
    • http://studiocariola.com/userfiles/files/18340231990.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/jcnhf64kdp31te4e7934h3b1v3/29239401276.pdfIn PDF document text
    • https://www.auto-ecole-rive-droite.fr/ckfinder/userfiles/files/wofadatozewiropug.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/1gdvu5pc84v83slsdn0sqeairq/491078398.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/26767726940.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608675998a15b---28385649753.pdfIn PDF document text
    • http://pritchardreunion.com/clients/81409/File/gokoboxotukagob.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16078e183eafec---13533784136.pdfIn PDF document text
    • http://elcampoeco.org/FCKeditor/file/42400395390.pdfIn PDF document text
    • https://emauto.lv/index/images/up/file/47670684070.pdfIn PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/95782611256.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=what+is+budesonide+and+formoterol+fumarate+dihydrate+inhalation+aerosolPDF 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_off0000ba3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA3D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d24f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD24F 15572 bytes
SHA-256: 063e902f3f4951a61db6ecffa9948a1f4ceaaf8967d0e78a41236be31963c38d
font_02_sfnt_off0000fa45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA45 10964 bytes
SHA-256: 59baf95cf13d6a42d218e369eb93f264dc4b16b5b1764b7fabf067dde5d7cd0c