Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b7ae02f42bed63e…

MALICIOUS

PDF

84.5 KB Created: 2021-06-26 04:50:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 92121aa39ea656ef2803d7bbb9a748a2 SHA-1: 235fcbf5d0df6d392bee75ff71dda783339fa4b9 SHA-256: 3b7ae02f42bed63ef86037c1c83495de36869a36b1b3a68fe5b21a88ede7ce09
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised or unknown domains, which is a common tactic for phishing or distributing further malware. The presence of embedded URLs and the PDF structure suggest an attempt to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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://greenfuturevietnam.com/Upload/files/dixozi.pdf
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/pr1klubbd15jcd8l95nfrjpeo5/77134625178.pdf
    • http://taskentcompany.com/userfiles/file/wanej.pdf
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092084f2a34d---zomuxuvorovesizup.pdf
    • http://sosnovgeo.ru/userfiles/file/75340998185.pdf
    • http://westmoorclassof1965.com/clients/5/52/52ec68f2b927accf75267cb07bfcc891/File/bapazeguxenixeleko.pdf
    • http://akcjonariusz.com/UserFiles/file/lanuwanozuzufujitupidime.pdf
    • http://anandtouristcorporation.com/uploads/77265248608.pdf
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/0fcfba6182b205db9bb1d353ceff7c17/82733523969.pdf
    • http://bbdecontra.com/userfiles/files/pakiwugegumivupuwe.pdf
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7b6793194---baguwosapubafesamab.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c06ef6ee171---55767548144.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/c31dc55904a927a675f4d86c86892c6d/zilumutifawezederon.pdf
    • http://finproekt-msk.ru/userfiles/file/58454649573.pdf
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/4gu37c4v9dfv1tkt19vkguie8d/gitevezudijunofu.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/k51hckslg7per05e4cp7bmlpf7/48569360545.pdf
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16073e8b6ac485---vetupokodipopu.pdf
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1609a51b69ed2e---wewekitamaxajo.pdf
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/jma6uvt2a5nff7sk8amdegllb9/82515224460.pdf
    • http://shreyaghoshal.com/konadnew/userfiles/file/87019410590.pdf
    • https://mytopics.it/uploads/file/butobekenowidipas.pdf
    • http://www.hon-ro.hu/userfiles/files/gidika.pdf
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072728d55e8d---42413205123.pdf
    • http://caphegiabao.com/upload/fck/file/vuzudageteluremetege.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b2577ce7ecc---2493774410.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=develop+ineo+164+service+manual
    • 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_off0000de78.bin
74c74cc8ba622f8cef60c88e39f03d7d0c0a4b406ee7948255f42a0f85a35a9c
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE78 19800 bytes
font_01_sfnt_off000111ac.bin
8409339926176ae320e4b8a48679331e7535a41af3ccfed4b52deeacfc8f2efa
pdf-font-stream PDF embedded font (sfnt) at offset 0x111AC 10900 bytes
font_02_sfnt_off00012aff.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12AFF 16792 bytes