Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bfdc6375a5169a1…

MALICIOUS

PDF

88.7 KB Created: 2021-07-03 00:54:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: b9da088191ecf361882a5104a0d7ca99 SHA-1: 30d3e5627b31ecef18d4d1fd1078d859e7a251ec SHA-256: 2bfdc6375a5169a10d218f18616908ac8c0bb248bfeeb7d14a9b9ab513c0a116
164 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous links to compromised websites, suggesting it is part of a phishing or malware distribution scheme. The presence of a visual download button further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d453ec0b8f1---18121345947.pdf In PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a468d88c97b---17537885502.pdfIn PDF document text
    • https://dentalrud.com/userfiles/file/fujefanafidafulowore.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/8s5fqhb33eckomuat7gkdg7v2d/34241570631.pdfIn PDF document text
    • http://abc-tel.ru/data/File/11475737594.pdfIn PDF document text
    • https://intervalhousehamilton.org/ckfinder/userfiles/files/nufixobofuturixalu.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/mogimavoxos.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/a8939a2123ba9012ff5508fa1669b2c8/melivolilakapujumodo.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/ca0e34d1b051b33603fbf91ebff9f922/4895346088.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/16094d4f46ae47---98828972977.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16098863333d43---vijefukeromidivifunapexa.pdfIn PDF document text
    • https://optimustelecoms.com/ckfinder/userfiles/files/silabenuzoperakiba.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/tenuwoxipuperijivug.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b25a8e2577---39500512230.pdfIn PDF document text
    • http://ibshop.gr/uploads/_uploads/files/sekigezekeruw.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/0e06038190d4f95ac70526a22a9bc316/48955027935.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a39b2a59d50---nubamorotolujixami.pdfIn PDF document text
    • http://sochistandart.com/ckfinder/userfiles/files/moxakig.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/f2c56c0c1c43475b7063ae171f6e64cf/98575383639.pdfIn PDF document text
    • http://edwardnugent.com/userfiles/files/43165496509.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7eb3054359---73828022162.pdfIn PDF document text
    • http://chanakyaaerospacedefence.com/userfiles/file/32779687938.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=the+priest+malayalam+torrentPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/8046a31a4987b88929dea03d8e7198b8/zagigedubixiw.pdfIn PDF document text
    • 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_off0000efca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000107dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107DC 21004 bytes
SHA-256: c5be9a2231b64bb30ebc8e73ea333e58129a527f4f69651b2e638bc0853fdeb0
font_02_sfnt_off00013d95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D95 10596 bytes
SHA-256: 1e16c4bf5d071da2fa2138685521f41f0816abec321e84b64bae2725551b1cdc

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