Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eb527b6f51a602a…

MALICIOUS

PDF

77.8 KB Created: 2021-06-13 21:54:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 0e493001834b27d2a81835385550e215 SHA-1: 674f6bc643364843e347215cea8e5b6ac260d5d9 SHA-256: 2eb527b6f51a602a8dd0d74ba0eb3bce1c2bf7aa4e8901dcac1034aae06d710f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress installations, and a primary external URI that appears to be a lure for phishing or malware distribution. The document body, though heavily obfuscated, suggests a theme of 'English test for beginners printable', which is a common social engineering tactic to entice users to click on malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pixomot.ru/uplcv?utm_term=english+test+for+beginners+printable PDF link annotation
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/d72f6752fdb3a3b40ab1e9c3ffbfea61/27517879943.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607283acc107c---45216096087.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/u3ipjrq9i73dnt26fpd26n239k/gefifurororelejudupate.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/5208642036.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/mofaxeze.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/64805f8290305fe9caac13a5a2979b0f/wupudomurosiw.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/pcm2maas0fp5n44hgkvf1jb394/59684042751.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f47b07904---79331830113.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/109b139437efdcdfbc1d14ac78def62b/63332462910.pdfIn PDF document text
    • http://gloucesterclassof81.com/clients/23558/File/rafowurerovolitizakeru.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088354680b31---38207120193.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c2d36a30d---33831038922.pdfIn PDF document text
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3614800ed---malizifagidonifajavizijoz.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/tbr6g8q1ssct4oosjn0041dcv5/46211922146.pdfIn PDF document text
    • http://hrzservices.com/uploadfiles/file/dasobarasigoxew.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f31c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31C 5260 bytes
SHA-256: 30eb4e485d96284ae751a166b25cee5e7fc559ee471783968642aa3dc44f6664
font_01_sfnt_off000104fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FE 10864 bytes
SHA-256: 1f9cb68d2bf545897026a0b4ca339eb8b07b7bcaf9a874f5a87b1526fda1e179