Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0e9d244454f4749…

MALICIOUS

PDF

119.5 KB Created: 2021-07-24 20:54:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 00dfe9156ae4ff893e5c3bf87e0ae3fb SHA-1: f3bed282e4c1f2f2ed97425498788f0335e7e386 SHA-256: e0e9d244454f4749ad0e876a9b244200e04bf8bdbb70659dedf6b4e6d0b5e3e8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which point to compromised CMS upload directories, suggesting a phishing or redirection campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary purpose appears to be directing users to potentially malicious external sites through a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://pampa.be/uploads/userfiles/files/bukopupedifesikexeginome.pdf In PDF document text
    • http://come2menorca.com/images/file/kotuwenofofagekubof.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/3af5251867f26175df4ff4e978098ccc/41964881162.pdfIn PDF document text
    • http://mulherinscampground.com/clients/879992/File/xedalixula.pdfIn PDF document text
    • http://gfb.it/upload/fck/file/genotisesebi.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4982d6d13---341554567.pdfIn PDF document text
    • http://hy-concrete.ru/d/files/13945136868.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075db7aca979---desejonokufodimatopi.pdfIn PDF document text
    • http://vivo-mebel.ru/upload/file/xomopivufibigeziditenog.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/2cc244aa93bccad78d444e8ab96eb887/20246232763.pdfIn PDF document text
    • http://happyhanool.com/ckupload/files/70672192973.pdfIn PDF document text
    • https://cartolmania.it/file/5677865685.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f1fe5323e95---tanagimikefobufefoziwuf.pdfIn PDF document text
    • http://www.almansori-ye.com/almansorifiles/files/miwaripajogafane.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/25545f9a4c7c5b5c1b388e43c37b9747/vimamera.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/7e273f8ae50f76182fb52ef5fddc74af/zufifololadefevegigodena.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16090f2d17d06f---vowexujugu.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b206f0c5d4e---10559579889.pdfIn PDF document text
    • https://zionapostolicministries.org/uploads/file/likedimafirakozakud.pdfIn PDF document text
    • http://baheth24cars.com/ckfinder/userfiles/files/figurigisigomu.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cfc5402edf---99399094833.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/0a50dd83818a03b1bc0017147e0ef6cb/zegogibizakixu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=agro+ecological+zones+of+malawiPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016aa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16AA0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000182b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x182B2 19720 bytes
SHA-256: 82b5ae42eb4e637b6c98d0c8b70e67db0920173927949482738fee499da16d2b
font_02_sfnt_off0001b763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B763 10708 bytes
SHA-256: 4a844ba064d3ab62a07243f8a19776de728fe4c55bfe72b8ffb2e35f239b7442

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