Malicious PDF — malware analysis report

Static analysis result for SHA-256 26d64a8a8da10520…

MALICIOUS

PDF

87.6 KB Created: 2021-07-19 13:09:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3c07aab3a51bef259a56a840cc68bdd7 SHA-1: c3af56e8b0b0e38667959ecea3c397b1a58ac5ad SHA-256: 26d64a8a8da105201ddd9add6fd6e649678a725bcea31c6ce48407405f90c2df
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as Pdf.Phishing.Trojan. It contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The presence of embedded URLs and the PDF structure suggest an attempt to exploit users by directing them to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 http://hatowo.com/app/webroot/uploads/files/95822569417.pdf
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b88571eb5ea---xumegabomiku.pdf
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095be41c9a2e---kidesip.pdf
    • https://digicpictures.com/downloads/33858615211.pdf
    • https://www.webplease.it/wp-content/plugins/super-forms/uploads/php/files/6f8nfh9ulk00f6i4qosmegf9k6/punuzivononezab.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/9a37db3c8dfbdf05a6d9716475bb57b1/dezolu.pdf
    • https://medtek.vn/storage/file/fitimewugavavumuzu.pdf
    • http://smepil.com/ckeditor/userfiles/files/manij.pdf
    • http://www.fd.ntou.edu.tw/ckfinder/userfiles/files/nekapise.pdf
    • https://qian-ho.com/upfiles/editor/files/71768675833.pdf
    • https://longhoang.vn/upload/files/nezojifigudises.pdf
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/8c5df9bc07fabd38f92616fb3e17395d/warupisutupagojefasis.pdf
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/483ae13ef351e360e8fea23ae50600cc/buwaxegiwowotege.pdf
    • http://kondicionery-vidnoe.ru/upload_picture/file/derigezufufofunakumuwu.pdf
    • http://asea-admin.com/_userfiles/file/20210508184551.pdf
    • http://crmloccitanecr.com/campannas/file/91983784018.pdf
    • http://maekuangudomthara.com/ckfinder/userfiles/files/pekos.pdf
    • https://nadamasristorante.it/file/35546934396.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1c4ab0b7e8---91270408184.pdf
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16077fef4e6013---sitibexenuxafesaxasimede.pdf
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/37100a3e0c3e263d48af912e0428dd4c/77798262154.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/0dqkg458q639tuqbn362grldj0/3438738468.pdf
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/h1iub9ktvvu6f0hfcm3rfhp8d5/14321231817.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=james+baldwin+the+evidence+of+things+not+seen+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_off0000ee9a.bin
f833b790d97d1195c75ef3d5c3580c6b3d8aad92afb6a8d36659428035900dde
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9A 18512 bytes
font_01_sfnt_off00011ed9.bin
2ad7945c4cd5255c2b21c392047622a2396dd35a3aa66a627788f3eb627dc260
pdf-font-stream PDF embedded font (sfnt) at offset 0x11ED9 11248 bytes
font_02_sfnt_off000138ad.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x138AD 16792 bytes