Malicious PDF — malware analysis report

Static analysis result for SHA-256 06309fea0d0464d3…

MALICIOUS

PDF

81.8 KB Created: 2021-09-06 06:52:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a5ebfb6795b331ba109ca4ef4fa0bad8 SHA-1: dc35da9867b1b5ac4133f4ed844da941ba2c3893 SHA-256: 06309fea0d0464d35c23df32d868052de76ad18de1452155418facbd0d0af668
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting. These links are likely designed to lure users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://tablica-nieruchomosci.pl/uploades/fckeditorfile/96762873352.pdf In PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e67e8a96573---15052295514.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///93342047104.pdfIn PDF document text
    • https://wfca-czech.cz/temp/userfiles/files/xigoxudofusijogugotarel.pdfIn PDF document text
    • http://logiccpacma.com/ckfinder/userfiles/files/12334203776.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/k29dg3ut95g0aupvom3u0nsco4/46219329056.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/74936818563.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3184950dba---65750172503.pdfIn PDF document text
    • http://wienbildarchiv.com/upload_files/files/31879618312.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/70083990071.pdfIn PDF document text
    • http://fasson.vip/images/editor/files/bazejafawabupuganizezax.pdfIn PDF document text
    • http://www.dereformasenalicante.com/archivos/files/26872500008.pdfIn PDF document text
    • http://phutungototuanphat.com/img-tvdl/files/ninaxibefozezolegagab.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/cfibt9tnajop27gmiokq0athck/99404261396.pdfIn PDF document text
    • https://abyway.lv/images/ck_images/files/31275244996.pdfIn PDF document text
    • http://kowel.com/ckfinder/userfiles/files/1622789110.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7d341f3c9---vogitoferujosawotama.pdfIn PDF document text
    • http://ashioke.com/images/library/File/bejiridivodo.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/divumafavuruwer.pdfIn PDF document text
    • http://honghuibio.com/d/files/55844506023.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8217736e52---jirilusipipadavewowa.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/2f416cd6f4511c2fd631254bd69e57ae/puxuropededamasis.pdfIn PDF document text
    • http://accronline.com/userfiles/file/zewupoturobo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=detalles+para+navidad+manualidadesPDF 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_off0000db56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB56 18104 bytes
SHA-256: 1cabe94544680f188f8bda43f6bd3aa098857dcba519e3d389537e309a039424
font_01_sfnt_off00010958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10958 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001216f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1216F 10600 bytes
SHA-256: 907b310148061ce303adf5e44123bee844dec8f198179e1ec6f9e8714f8bf900