Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba1d942f7f6ea272…

MALICIOUS

PDF

91.3 KB Created: 2021-07-10 12:03:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0d4aa56651f41653d9012d06260e68ad SHA-1: b05967706dc1764c133454c2839ad7860952ba3c SHA-256: ba1d942f7f6ea272ed92e7be66d1a665fe00dee0690488a4849d5c07060ade06
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://inwebjor.ru/uplcv?utm_term=song+i+bust+the+windows+of+his+car
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/06f48acaec4a1390cb1f61a20b70c93f/siwalugubutemabar.pdf
    • http://caopump.com/admin/userfiles/file/kiboratim.pdf
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/16071e182941a5---4622677583.pdf
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c8dddb1efb0---8301366854.pdf
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/q15e62ter4hep2qkugfno49iv6/golorobidijufeloxot.pdf
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab237d15dc---81118704760.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160901377a14ab---83508467299.pdf
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/s3t5o3jbk3blm50m5lrj843kp3/47513555357.pdf
    • http://php-lounge.de/userfiles/file/59815619546.pdf
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/bc174a2a5f6abc29032318b9ade6853c/48139009834.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ceb06752f9---xegumozul.pdf
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/t3uod72u40rp43l53gv80mhnmg/litiwaxisurifepikifotej.pdf
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160784f005c9c8---82204755490.pdf
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/ac1d30e13d327e83121973953f01a086/59388782662.pdf
    • https://kaxtongroup.com/home5/maxconne/public_html/kaxtongroup/assets/images/newspostimages/files/sefaworinamanudivir.pdf
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/4e55dc015bd1bc22804f27a5cdbd62c6/viwilavomamipeju.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/73af74042d2498c073b04bc203c03953/53630789502.pdf
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/022b0343f29589dd2741dbc2db9665a7/28878101726.pdf
    • http://autosoftware.company/autoresponders_images/files/15816004530.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a06726d5d---rorular.pdf
    • http://hamdard.com/hamdard/app/webroot/img/ckfinder/userfiles/files/38979922330.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/cd2fee473457f2289790cfa5b9b97101/47499185950.pdf
    • https://nhathuydesign.com/wp-content/plugins/super-forms/uploads/php/files/7pkntnc4vt1lmsjtoipa462np2/6300252089.pdf
    • http://contactconfiance.com/files/files/vakin.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001038d.bin
cafbd9c63a5206ee328584f7277fbaf15e20ce16da498ace60ad936892c1da3b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1038D 11108 bytes
font_01_sfnt_off00011d54.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D54 16792 bytes
font_02_sfnt_off00013566.bin
2ec5a1efab3f72f9d72e872a2f3b1c5f7866c97e7bfc26aae0743f5b04376967
pdf-font-stream PDF embedded font (sfnt) at offset 0x13566 16280 bytes