Malicious PDF — malware analysis report

Static analysis result for SHA-256 b85dae5d5cb6a1c5…

MALICIOUS

PDF

79.5 KB Created: 2021-09-21 01:17:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 093e628ed349a80374960be3ca3a11d2 SHA-1: 3d075128d4f0325b9684d71168b075bd906938d9 SHA-256: b85dae5d5cb6a1c5baf31964ee96482549fbfe7c850e8468de1cf211a73d72b4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, a common technique for executing malicious code within PDFs. It also functions as a link farm, directing users to multiple external URLs, some of which are hosted on compromised CMS platforms or disposable domains. This suggests an attempt to lure users to phishing sites or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pixomot.ru/uplcv?utm_term=best+3d+cad+software+for+3d+printing PDF link annotation
    • https://sofupingame.com/calisma2/files/uploads/72421052821.pdfIn PDF document text
    • http://inbiosa.eu/static/cfiles/files/57044126492.pdfIn PDF document text
    • http://yuilchem.com/userData/board/file/10031340109.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/77c6976df3a4b1dffa4bff60aca85d08/31920124660.pdfIn PDF document text
    • http://veiligheidsslot.nl/ckfinder/userfiles/files/3598446008.pdfIn PDF document text
    • http://geoscan.it/userfiles/files/26994045556.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d8de49aada70be936e795b8e3a596741/31695713504.pdfIn PDF document text
    • https://lbjgold.in/ckfinder/userfiles/files/92375980112.pdfIn PDF document text
    • https://postele-z-masivu.sk/ckfinder/userfiles/files/31382575949.pdfIn PDF document text
    • http://delta-serwis.pl/pliki/nifizilibojejewitatesibe.pdfIn PDF document text
    • http://liveranigioielli.it/userfiles/files/nevukifinelutefas.pdfIn PDF document text
    • http://fw-simple.com/uploads/files/30237012505.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/jonov.pdfIn PDF document text
    • https://irisapp.cn/uploadfiles/fckeditor/20210918/file/16319133865211.pdfIn PDF document text
    • http://m2m2design.com/userfiles/19461695650.pdfIn PDF document text
    • http://pinxedien.net/upload/files/pofurivasonuz.pdfIn PDF document text
    • http://tilestone-pools.com/i/File/17252123602.pdfIn PDF document text
    • http://daiichibus.vn/uploads/news_file/dobodu.pdfIn PDF document text
    • https://kalashad.com/userfiles/file/49000036333.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148259537d26---pikirepupibaj.pdfIn PDF document text
    • https://brothers-music.com/ckfinder/userfiles/files/19922850305.pdfIn PDF document text
    • https://www.ccs-corporation.com/ckfinder/userfiles/files/xusotigitilapu.pdfIn PDF document text
    • http://aviapartner.biz/js/ckfinder/userfiles/files/pegavilumizu.pdfIn PDF document text
    • http://ilkjv.com/Images/Media/files/52875986805.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_off0000d0ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0ED 11060 bytes
SHA-256: c4e1262bc2e990aeeb5e36f43ae8702522c639d1b41d17eac06ea803b5485366
font_01_sfnt_off0000eab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB9 16948 bytes
SHA-256: bf3a361295457f5ccf4cea9f29bbafbae3fb1274dab2bc7619057fe7b432b0b3
font_02_sfnt_off0001164d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1164D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.