Malicious PDF — malware analysis report

Static analysis result for SHA-256 f83054e46058b442…

MALICIOUS

PDF

103.3 KB Created: 2021-07-22 03:06:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 986fb19b4940b0ceb382fd90f5a05f0d SHA-1: 6f7ffccb747a00070f19791d462b15f224d07fb4 SHA-256: f83054e46058b442164bc462e2f85366171c34881265d91c9d963ef3aeccb416
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many hosted on compromised CMS upload storage, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the heuristic findings point to a deceptive document designed to trick users into downloading further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/70c2ef4dbcbe8128d6fdb78105eda429/41921568199.pdf
    • https://louvre.lv/res/wysiwyg/file/37595224626.pdf
    • http://internationalbeautypageants.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/80972638227.pdf
    • http://danangsculpture.com/uploads/image/files/fajunudemowap.pdf
    • http://analogsys.com/uploaded/file/946347046094923d15fb5.pdf
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/r62ib04bk34h3h9eiat9rc526h/38981044316.pdf
    • http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/e9eb22c39fa922d39d270e456a349819/vomotasoribe.pdf
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/91737d2ae8b89af829caab25d750498c/25208828839.pdf
    • http://fmi.lu/userfiles/files/jimonawezoguxedibepuju.pdf
    • http://wrhs1976.com/clients/0/08/080801f2a31a95d446b71e9836a5425d/File/88046022863.pdf
    • http://consol.hu/images/uploadedimages/file/37396859692.pdf
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/5d445cccfe885cb58e513a262147b7df/43257193055.pdf
    • https://walkandsmile.com/userfiles/file/20263117794.pdf
    • http://tokstar.com/_UploadFile/Images/file/biniwesu.pdf
    • https://netiko.ge/img/Data/file/sulizipima.pdf
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/be8062799e09c608499433ec199ab5bd/gavorukevebuloto.pdf
    • http://svb-volleyball.de/userfiles/file/61305684572.pdf
    • http://n-production.com/upload/fckeditor/file/34582400516.pdf
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/e428i20nuiaim4a9bi0v0qal80/bowulefi.pdf
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160a2cfc66ecda---kavovam.pdf
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/hdc76q9c4ko9p1fn2l2uvploe0/visilosariwaromifipopo.pdf
    • https://hirurgija.me//files/85238271748.pdf
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16070a775e3513---70527559587.pdf
    • https://theatresaucinema.fr/uploads/file/62474106581.pdf
    • https://eyetracking.pl/userfiles/file/nobimenozokevibetazogupi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=how+to+download+obb+file+for+gta+5
    • 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_off000130a2.bin
d556c0dc71deaf496833111d76453c6b45232fd1071382a638b685620c94ddc8
pdf-font-stream PDF embedded font (sfnt) at offset 0x130A2 10712 bytes
font_01_sfnt_off00014926.bin
1eaf02ac4295a46634f7208e3434b5923f4859d83c140a4cda8674544c0608be
pdf-font-stream PDF embedded font (sfnt) at offset 0x14926 17296 bytes
font_02_sfnt_off00017680.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x17680 16792 bytes