Malicious PDF — malware analysis report

Static analysis result for SHA-256 30a5b6cb1484ed1e…

MALICIOUS

PDF

83.1 KB Created: 2021-06-25 13:20:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4706de11ed641ac0557f0dcda0c26006 SHA-1: 598b01a185f77b9de0793c88780ebe701eeb6015 SHA-256: 30a5b6cb1484ed1e5b398e6ee3fbec1fe253ee737cf10e0b50f04a96dcc1b409
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to WordPress sites utilizing the 'formcraft' plugin for file uploads, suggesting a link farm designed to host or distribute malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification further support its malicious nature. The presence of multiple distinct hosts and the use of UTM parameters in some URLs indicate an attempt to obscure the true destination and potentially track user engagement with the phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ccdf62dd727---32273112912.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d0bf6c545---32623435944.pdf
    • http://archerelectricsupply.com/userfiles/file/51143905525.pdf
    • http://meble-tk.pl/userfiles/file/vuxezolawuvase.pdf
    • https://alatheir.com/atheirwsfiles/file/gajovitutabeguwabusipatal.pdf
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b86c72ea8db---fazazix.pdf
    • http://ash-graphy.com/userfiles/file/xowetuwopapudamiguripib.pdf
    • http://wildpflanzen-planung.de/file/57281423513.pdf
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/771c6bd029e8497298223a61fc7eab8a/guvurabupokijukiniw.pdf
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/0c316d6580750c42cd1aa28c423ba8fc/wewuseragigaxelera.pdf
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/sv31i8f9efdcrgeg082uhk6357/89209268169.pdf
    • https://easy2ticket.com/upload/files/jetovimidabat.pdf
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b465a45c0d5---36726301822.pdf
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16097c9af0be7d---saredivis.pdf
    • https://sasalidayanisma.org/uploads/file/49870022823.pdf
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/8859sj65bsvku3ueqc7fiahj0k/7510297795.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081c2a5c6e78---jijulasinimoxuwewefo.pdf
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/0rh6dqeflhastqtfh9j8238si9/lozusolonumabapodixorafip.pdf
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8420893cff---zamipaza.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=five+glands+of+the+endocrine+system
    • 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_off0000e23b.bin
840c17872d126f3e39fe1a4c4d5d249fcbf6179976d18cd20875c00f97145e35
pdf-font-stream PDF embedded font (sfnt) at offset 0xE23B 16788 bytes
font_01_sfnt_off00010e03.bin
7088f8319e3d1023b9934e038a6b982346cdf7708167b521f059a2100725d2ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E03 11080 bytes
font_02_sfnt_off0001277e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1277E 16792 bytes