Malicious PDF — malware analysis report

Static analysis result for SHA-256 19dc9fe78d13d5fb…

MALICIOUS

PDF

80.2 KB Created: 2021-06-25 10:29:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: fbc0d51004ca7067b5774f3f2f5cbf65 SHA-1: 5ab992ea70951c6323310a4335bd303723a29a81 SHA-256: 19dc9fe78d13d5fb3d107250c10d03b838af77258e97419b14b7074f9535d79b
176 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to compromised WordPress upload storage, indicating a potential phishing or malware distribution lure. The heuristic 'SE_ENABLE_LURE' suggests the document instructs users to enable macros or editing, a common tactic for malware droppers. While no scripts were directly extracted, the PDF structure and embedded URLs strongly suggest malicious intent, likely to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/16071d87cc3955---denofizawemakamirot.pdf In PDF document text
    • https://marosme.ro/hirek/file/98621194543.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/64dfc295f7537b6a5eb6b24c9a1e5224/97639041245.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/26899757453.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/5ievtiu0en56ee7fbsbkhhru2t/fokupidan.pdfIn PDF document text
    • http://cateringkieuan.com/uploads/userfiles/file/fugalubibumakulapez.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/49e832dcc180f1563a93c9d41359225a/4499599404.pdfIn PDF document text
    • https://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/dazakiguxug.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/qc3udtr44b5kqm0l3f1hfnkp20/zewekamuropi.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/dirifanixe.pdfIn PDF document text
    • http://maxidmum.com/images/upload/fck/file/kemewut.pdfIn PDF document text
    • http://abogarestudio.com/userfiles/file/73982165166.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1607152bfed26d---tibeximedowemetupotix.pdfIn PDF document text
    • https://actorconseil.com/files/file/zemavetajanijapewixi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=the+marshall+plan+for+novel+writing+pdfPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f89b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89B 5556 bytes
SHA-256: 37c0edb21dd8d60b71afef24fe4689f8fc736620493b3715975c5e5bfa378c67
font_01_sfnt_off00010b65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B65 11460 bytes
SHA-256: 9fe2597c27f7534cba290171c095fd5015431add7a05e1c983ebbd63f33a847a

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