Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c1b17c304ab22a2…

MALICIOUS

PDF

84.9 KB Created: 2021-07-03 05:53:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fde2fb3f115ea7196817f93338b2afd2 SHA-1: e0fafa5495db9b00394dc480a0ad26852ef6ab6e SHA-256: 4c1b17c304ab22a2610838a388f51e4767a0486e4d3054e6517368a5ca7f95e1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, likely intended to redirect users to malicious content. The presence of multiple external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/cee7765dfa1cc2e50164423234e45ccc/tanomorelipapugapidirabon.pdf
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/92b49b97165779bd44bf91d29adfc1d6/pebumube.pdf
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b06480089---89205105636.pdf
    • http://anatolianlgs.com/userfiles/file/wenakufeboxo.pdf
    • http://gongotour.com/FileData/ckfinder/files/20210601_96B73CCA0AE125CD.pdf
    • http://aaaexpressac.com/userfiles/file/94407485583.pdf
    • http://superfishinglewood.com/uploads/files/59023555916.pdf
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/0abf5e3e1b93590ab5c236404bfdbac7/2326037601.pdf
    • http://nutronicltd.com/userfiles/file/petavenajixedelukiboka.pdf
    • http://parentini.it/userfiles/files/87852048645.pdf
    • https://pensiuneavalentina.ro/app/webroot/file/ruduxufidutejubavu.pdf
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/baf755833fad2b2b8f76b0156ea57f52/zojefedixemiz.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1608cca20d2b2c---wusatorik.pdf
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b94ba03541f---fapapifawagutosepodo.pdf
    • http://feach.ie/images/uploads/file/57157071099.pdf
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/00a46286061af00ca896e8ea002d0e6b/zakotepegenukitumam.pdf
    • https://vegas-shop.net/uploads/files/20639392276.pdf
    • http://steelbo.com/uploads/admins/u0/files/20210608203703.pdf
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1a650d3d8f---83637740662.pdf
    • http://www.srijonihealinghome.com/fckimages/file/fadixe.pdf
    • http://kme-kme.cz/files/file/nuwajerogoluse.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=v24h+iphone+xs+max
    • 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_off0000e93e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE93E 16792 bytes
font_01_sfnt_off00010150.bin
2e3dc680005e6d72ddae9306207210269b1b2bfdbefc0b1ec946cf5eb7072012
pdf-font-stream PDF embedded font (sfnt) at offset 0x10150 17488 bytes
font_02_sfnt_off00012eec.bin
37545a3be9450623d16c4338eac8bb311d1e9ac25ff48efbb8365537b4961f29
pdf-font-stream PDF embedded font (sfnt) at offset 0x12EEC 10540 bytes