Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bfbcef8640db59b…

MALICIOUS

PDF

76.2 KB Created: 2021-07-07 06:52:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 86cbe1054ea3ef8085fb948a6695c7ac SHA-1: f53b54ed23dcf3d916fc2e20ca2ef9f6090e3f80 SHA-256: 5bfbcef8640db59b8a143a4df72b67fc1238ffac7b60496d977ebf4b52b18a8b
124 Risk Score

Malware Insights

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

This PDF file functions as a link farm, directing users to multiple external websites. Several of these URLs point to compromised WordPress upload directories, indicating a potential phishing or malware distribution scheme. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4750

Heuristics 5

  • 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
  • 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://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/3f673005a9d6ae59db6cbdbac2739f34/98601215902.pdf In PDF document text
    • http://wenxuezj.com/images/File/39882731292.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160942f62af9cf---4589080518.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/654bf54eadd9fd48fafabd4c4974042c/42799751836.pdfIn PDF document text
    • http://poslovniimenik.net/firme_data/files/xekefibamotevoto.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/vaau24vgvohcobajdj95tp8290/51008086512.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/31032716090.pdfIn PDF document text
    • http://msinternationalbeautypageant.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/bumaza.pdfIn PDF document text
    • http://myqself.com/upload/files/20645699530.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/cf54t89a154cgsaeiq7jkr9tht/dinosoredifidimo.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/12m501hjue7a7d7tncacttn8n0/20116003895.pdfIn PDF document text
    • https://gtselect.fr/ckfinder/userfiles/files/sutuw.pdfIn PDF document text
    • https://amthanhanhsangchinhhang.vn/upload/files/vogibesizaruridowuxik.pdfIn PDF document text
    • http://northmarking.com/userfiles/files/feretilobowaduketun.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad95db96856---kajaxidadasisafurawi.pdfIn PDF document text
    • https://a-1commercialkitchenservices.com/ckfinder/userfiles/files/ravigusojifilixerilu.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/7d1154d76c013bc4f9cc020135e487db/manufi.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9af1f2dbbf---xopegu.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/nerigajebavofetove.pdfIn PDF document text
    • https://aedwea.com/upload/foto/libozugonebeva.pdfIn PDF document text
    • http://szkolka-wiercioch.pl/files/file/9515220212.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ad4ccced1ab---kupevidiw.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/ab15t1n7osq7dc9dn9v9led9or/29729705534.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/753a8f35a9d54b24673419026dede8ad/nesesikapizonotanuxumu.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/ccd351e5b8f34c32e8cc5d97d8a336b3/zasokasuxujap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=differentiate+between+aerobic+and+anaerobicPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e49b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE49B 16444 bytes
SHA-256: 4c7c7cf7fdd164e3e33d4e4d5ade5d5e57ec936beea049f0deaf582107750fb1
font_01_sfnt_off00010efe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1