Malicious PDF — malware analysis report

Static analysis result for SHA-256 48fe699446f170c7…

MALICIOUS

PDF

77.4 KB Created: 2021-09-01 09:15:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 52b6d206b31dc494a20ee5683066caa7 SHA-1: a603e913492b8b26374e45f73c49c9e06ca7ecb5 SHA-256: 48fe699446f170c786645c178886794d299b41671ddbb0f59f3ad3b73b9a702d
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document's structure as a link farm points towards an attempt to lure users to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f0c55e88b1d---biminikeg.pdf In PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/4dbd980ad2ff98ccf89241562e39f904/dukadomeliw.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16092fcd7b8802---83857681985.pdfIn PDF document text
    • http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/2021724852477519.pdfIn PDF document text
    • http://homeopathyhongkong.cn/files/63160818659.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/70d8b0c1aa877aab8c8919be97a0f86c/pezijekuruvubixonolijo.pdfIn PDF document text
    • http://archidaldegan.eu/userfiles/files/41615819150.pdfIn PDF document text
    • http://xn--b1agjlwjc3g.xn--p1ai/ckfinder/userfiles/files/likewevon.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610ae3a36ba39---dibakakikubite.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160732e6de9438---80900016868.pdfIn PDF document text
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/98594971248.pdfIn PDF document text
    • https://ekransamara.ru/files/59569436265.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/rfis4o0uvvdh1k8lbf243f3oc5/memetatojus.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3694b97813---98422064000.pdfIn PDF document text
    • https://uzunlarpeynir.com/dursun/upload/files/19136296162.pdfIn PDF document text
    • http://baovephuongtroi.com/vietkiendo/upload/file/wugikosogowexozejari.pdfIn PDF document text
    • http://colegiosantarosa.com/uploads/imagem/file/xejebawe.pdfIn PDF document text
    • http://dezmaster.com/userfiles/file/zafebabig.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/d400ojkf2teqqo4t03okvs2r73/55439033462.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/bc2ab0fed97a8bffe0569cd3e83e690a/96779259465.pdfIn PDF document text
    • https://marathonblainville.com/userfiles/files/30884979665.pdfIn PDF document text
    • http://banghetretruc.com/media/ftp/file/91398194309.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/ripuvegas.pdfIn PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/184be5e459d54798f3ab049ce608653e/25174265756.pdfIn PDF document text
    • https://alyosserspneed.com/userfiles/files/32119170458.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=epson+t20+manualPDF 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_off0000c814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC814 17812 bytes
SHA-256: 906bd0dd68a7a8a95522fae45c65437c37988018bf69b16ca8f067ac48bee641
font_01_sfnt_off0000f63d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF63D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010e54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E54 10416 bytes
SHA-256: b1b283b9463714c92f64d6895b4fe9494ecde3aa35186762e9284f7b2902157a