Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6be2689a7a79fe0…

MALICIOUS

PDF

71.5 KB Created: 2021-09-26 23:49:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c6da37df265bc1af2822d7b94db9b18c SHA-1: 13ff09f2695c2970c4fdc303a55826c0d1bd0ff8 SHA-256: a6be2689a7a79fe01a29e0126f6a26150c9e082db64bb71e15570ad85d1dc479
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a phishing/trojan PDF by ClamAV and an ML classifier. It contains numerous embedded URLs pointing to various domains, including compromised WordPress sites and disposable hosting, suggesting a link farm designed to lead users to malicious content. The presence of external URI indicators and link farm heuristics strongly supports a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://irlanc.ru/uplcv?utm_term=factory+reset+android+no+password PDF link annotation
    • http://sro52.ru/uploads/files/36887779651.pdfIn PDF document text
    • http://qapoll.com/2015/vat/upload/files/48594625242.pdfIn PDF document text
    • http://emeraldcovepartners.com/_data/images/file/vepigokifubix.pdfIn PDF document text
    • http://csc0535.com/userfiles/file/20210915202213_is810p.pdfIn PDF document text
    • http://www.yankey.com.tw/demo/public/editor/ckfinder/upload/user_upload/files/77052334334.pdfIn PDF document text
    • http://spielundlicht.de/content_provider/documents/files/88070548306.pdfIn PDF document text
    • http://hoanggiaphatstone.com/upload/files/gewobukakijiralanep.pdfIn PDF document text
    • https://ximangcampha.vn/upload/files/vuvazu.pdfIn PDF document text
    • http://sanalights.com/admin/admin/uploadfiles/file/kapukemefedavup.pdfIn PDF document text
    • http://pokebarslo.com/uploads/files/gudevuganep.pdfIn PDF document text
    • http://allgeology.ru/ckfinder/userfiles/files/99184757905.pdfIn PDF document text
    • http://gcsiva.com/files/userfiles/file/loluxafoluwigelovadipek.pdfIn PDF document text
    • https://5ky13lu3-1251.com/contents/files/teledodabiwebodatidamoluj.pdfIn PDF document text
    • http://hennel.hu/sources/elemek/file/nininubamoreris.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/8d98e6e4ce7f682c3cc35652f0eb8ac0/guparog.pdfIn PDF document text
    • http://dtyxbpzx.com/filespath/files/20210902053618.pdfIn PDF document text
    • http://hiniceshine.com/upload/modabezawizigezabuvezine.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f18cb1bbce---56888394198.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140373b07394---20306859191.pdfIn PDF document text
    • http://mlsconsulting.net/cms/files/File/zuwife.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16150897564871---52556761139.pdfIn PDF document text
    • https://szalkasszorutacskok.hu/app/webroot/files/content/files/xukedodo.pdfIn PDF document text
    • https://vinaarc.com/app/webroot/files/ckfinder/userfiles/files/lesafisatiletewalar.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/e649c038dc163900d618bb0cbce48acc/duritofovigasitusoto.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16133bea1e2670---60045340764.pdfIn PDF document text
    • 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_off0000b3e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cbff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBFF 10640 bytes
SHA-256: 7aff066f3cf185b4694e1b6c6a0c9a73def37f29b9f0a2fde1a288ae1e2a89fe
font_02_sfnt_off0000e48f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE48F 16980 bytes
SHA-256: 487b58de3f8efff32793383f7958362d27b9a36c034a4468e9dea9fa24005d16

Open this report in the interactive analyzer, or submit your own file for analysis.