Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b4df2dae255cbf1…

MALICIOUS

PDF

75.3 KB Created: 2021-08-21 00:52:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 78a029accb6621a65f504cefd19454ef SHA-1: b4c70412e12088fdbcac5ff2dc3bcb04d1860ffe SHA-256: 0b4df2dae255cbf11bf9acd58f19b102e26e8938acf9b60bcf11c020de00a7e7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV detecting it as a phishing trojan. It contains an embedded JavaScript stream and numerous URLs, many of which point to compromised CMS uploads or disposable hosting, forming a link farm. The primary purpose appears to be redirecting users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://lamachine.nl/userfiles/file/wiwevagamuda.pdf In PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/bq0ls3oosucbcnso0ktde683q2/simijonukesi.pdfIn PDF document text
    • http://ymy-tea.tw/upload/files/31568822328.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afc0761fc46---wikozuxikozetixof.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/zubafodezarotapawi.pdfIn PDF document text
    • https://baongochoa.com/upload/file/29780099437.pdfIn PDF document text
    • http://location-appartement-venise.com/italie_documents/files/11835938285.pdfIn PDF document text
    • https://chptravel.ir/data/file/xaxidom.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/zajefaxufe.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/eab71963b7c1b37230b6e3afb5fd1750/xovume.pdfIn PDF document text
    • http://izeninfo.net/admin/upload/files/mazumebixobevuxisokifiz.pdfIn PDF document text
    • http://chanakol.com/ckfinder/userfiles/files/53061104858.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4eec575101---64645809602.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/73302938809.pdfIn PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/b9bf3ad0e5ba39f6cd2987c74da830df/79758321092.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/40804762301.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1607e633cc2041---rakufevawelojusubu.pdfIn PDF document text
    • https://tndvn.com/js/ckfinder/userfiles/files/49521051571.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/ee8dc122403af38884a76e64a826d002/xisipobivijufisewal.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/j38qaakhk796261eccvg894fvu/28763528578.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607616c040820---wepazog.pdfIn PDF document text
    • https://bouwservicewinthagen.nl/userfiles/image/file/84490837273.pdfIn PDF document text
    • http://digitalpolicycouncil.com/imagenes/file/wudixexozozeteromu.pdfIn PDF document text
    • https://floraplant.gr/FCKeditor/userimages/file/sorenavuk.pdfIn PDF document text
    • http://clubchic.lv/c/i/files/zipexuje.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=economics+%28mcconnell%29+ap%2A+edition+20th+editionPDF 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_off0000c1cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d9dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DD 15856 bytes
SHA-256: f6592116b8818b0a7af7befd69e3a13859e8a58aee423ed259a80b2332e25959
font_02_sfnt_off00010287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10287 11144 bytes
SHA-256: 69b99267a2f255237ab4e4ab1466090b7d3563b24ec66d49b6b99c358eae3906

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