Malicious PDF — malware analysis report

Static analysis result for SHA-256 32f2829f8115de43…

MALICIOUS

PDF

91.3 KB Created: 2021-08-10 20:25:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: af7e036b6745493893339ea789453b88 SHA-1: bcc6773c6074ec59c6b50890f02a102ba60b52d4 SHA-256: 32f2829f8115de4351b48182179e88fa7f827390403693138ea0848d26008715
156 Risk Score

Malware Insights

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

The ML classifier and ClamAV both flagged this PDF as malicious, indicating a high likelihood of malicious intent. The document contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm designed to obscure the true destination. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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://bunyaminerdemir.com/resimler/files/misejekokipojigexop.pdf In PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/019c4f04c95d14144d7708ae5f4bdc24/fitunowokotifira.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/854u92n8m3h03a31r6npl9ul0t/gugofu.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/14f194eea94d5a89b4d32717e035e150/26094877545.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/mc2ncdga6evckhcnuvh43fk5r3/2991047959.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/14c189660575263800327bfd9dddd071/86905537320.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/436f3f5b7ed605430e358ebcb56303c6/xadivufevikupazemodunuvu.pdfIn PDF document text
    • http://www.herbertvanderbrugghen.nl/draft/lomiwamo.pdfIn PDF document text
    • https://wumusk.com/asset/uploads/files/93392841339.pdfIn PDF document text
    • http://busangh.com/attfile/fckimg/file///20210621133526_1053962936.pdfIn PDF document text
    • https://doctmcooper.com/userfiles/files/lamuvawolufekoniru.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcff74453d2---18908138183.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/1903f5ed0fb711fbe1cecca9ade7d818/melitazilirozuwapalasog.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/30187814468.pdfIn PDF document text
    • https://k-barrierfree.com/FileData/ckfinder/files/20210618_148E8CE01083E0A8.pdfIn PDF document text
    • http://prplus4u.com/ckupload/files/22925288491.pdfIn PDF document text
    • http://archetipoingegneria.it/userfiles/files/varibixafisasiji.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070146344aba---gumevapeluf.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a72dc66cb5b---26561252608.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/2436cb75c6cb78a6dfbbf7ee99600ab8/74616003277.pdfIn PDF document text
    • http://etenindex.nl/images/uploads/71509205947.pdfIn PDF document text
    • http://rockpapersun.com/upload_mce_image/file/manewuvotolasogewevik.pdfIn PDF document text
    • http://cesishotel.lv/res/wysiwyg/file/90249805021.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/2140312db582e59f9ea3cd5761634b35/74832581098.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/idq52k45g3eqpqd03614nfjn54/30344517593.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/ddf6ad02b842cd4ea4cca45f2087a51a/vamifupuwo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=how+to+factory+reset+disabled+iphone+se+without+computerPDF 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_off0000ff88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF88 16980 bytes
SHA-256: cfa5cff455494d1647020d02307019a7184166f7695c7f034e10e17c9c2b7876
font_01_sfnt_off00012bf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BF8 11316 bytes
SHA-256: 18568fae12bb3d4b50bf0279d69516a0770e43d3089a232162834cb904cd0e04
font_02_sfnt_off00014631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14631 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1