Malicious PDF — malware analysis report

Static analysis result for SHA-256 501c48cb5e0d6c38…

MALICIOUS

PDF

80.0 KB Created: 2021-10-09 22:26:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 5d5682ab8a30fa28d567f9d0d3a60b29 SHA-1: b0df4a3a8e165cf4682489c8b7501ffba0fe4656 SHA-256: 501c48cb5e0d6c38dbc484708adcbc1e1751fe98e49bed94768bec11cc85b1e9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within PDF documents. The numerous external links, many pointing to disposable hosting or compromised CMS upload directories, suggest a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://xn--80aadq3ae7aa5k.xn--p1ai/upload/file/rebegomolasomabutupuxav.pdf In PDF document text
    • https://cnn-logistics.com/asset/files/kizotikujawaxemotunor.pdfIn PDF document text
    • http://pbhdom.eu/userfiles/file/79992747403.pdfIn PDF document text
    • http://ttccid.com/userfiles/file/75758959897.pdfIn PDF document text
    • https://hyosung-gulf.com/uploads/file/27900138345.pdfIn PDF document text
    • https://ojazzdance.fr/userfiles/file/bejodisofopamalisos.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/041113362502.pdfIn PDF document text
    • http://aviapartner.biz/js/ckfinder/userfiles/files/dovesebor.pdfIn PDF document text
    • http://greenbelt.abwingsmd.com/uploads/files/midazodotalumogeditax.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/161414c683e459---771773294.pdfIn PDF document text
    • https://bomnuocebara.com/quangbasanpham/app/webroot/upload/image/files/76625533155.pdfIn PDF document text
    • http://lixupeng.com/uploads/files/75810801316.pdfIn PDF document text
    • http://falconltd.pl/cache/file/sonezozagiwep.pdfIn PDF document text
    • http://fedime.org/imagenes/dovawaka.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/7a03ad53e2fb09744a6eb113c4e19e1e/94399883809.pdfIn PDF document text
    • http://saopauloairporttransfers.com/ckfinder/userfiles/files/vumeloxutojoti.pdfIn PDF document text
    • https://ocw.tw/uploads/files/83789867410.pdfIn PDF document text
    • https://cheesykeju.com/contents/files/gopatusaranixosuderemun.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16158978cdf384---49869086480.pdfIn PDF document text
    • http://sithome.com/upfiles/file/20210915183530.pdfIn PDF document text
    • http://designklasse.de/ckfinder/userfiles/files/83768254416.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-10-2/20211002172335235108.pdfIn PDF document text
    • http://chinastom.ru/userfiles/file/46828743682.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=cleaning+up+the+thames+ielts+reading+answerPDF 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_off0000d43b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD43B 17832 bytes
SHA-256: 1aa04f77f375ffec536c58ad6d78923a2413c4fca33edf299c3015ee181a0e9d
font_01_sfnt_off0001015d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1015D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11974 10936 bytes
SHA-256: 32ccea83a4d85bb3e87872cd787c70dafb7a5560796d329a859acf0eb9786d1d

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