Malicious PDF — malware analysis report

Static analysis result for SHA-256 d507cf715e6929f6…

MALICIOUS

PDF

68.2 KB Created: 2020-12-13 22:41:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 5bef233f3c860a1641282fca579a8613 SHA-1: 6b0213a78916aaf94965c8d9efb90a019c6e7268 SHA-256: d507cf715e6929f6711d37d1f4ed1b297ada3f5a39ed33832d4efdc802a729d9
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to 'traffmen.ru'. Another critical heuristic, PDF_SEO_LINK_FARM, indicates a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the nature of the embedded links and the PDF structure strongly suggest a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffmen.ru/strik?utm_term=mod+apk+games+offline In PDF document text
    • https://xugubevowasisof.weebly.com/uploads/1/3/4/8/134885616/9ecac53f6.pdfIn PDF document text
    • https://supavutoni.weebly.com/uploads/1/3/4/7/134713891/xupukuja-gevojad-toxavuzofi-dawiginudaje.pdfIn PDF document text
    • https://kupanonul.weebly.com/uploads/1/3/4/6/134682697/nujolabunef_sovevamuzuri_xuwaxesasiw_magosezogife.pdfIn PDF document text
    • https://juleladenoduko.weebly.com/uploads/1/3/4/4/134478401/fajisijul.pdfIn PDF document text
    • https://momezinitakik.weebly.com/uploads/1/3/4/3/134322843/02517801ed6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cab99dd8-5239-4c32-9c06-d4fff900b2a1/26163646593.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/can_berberine_and_metformin_be_taken_together.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/509bfa1f-2c11-4fc5-a971-03cb08fc92ce/kufavixedirubatufeganuwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8af907be-2dbc-4065-abfd-d54e35d2a611/wii_manual_troubleshooting.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/redbox_apk_android.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/urdu_shayari_photo_gallery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abf648c9-854c-4073-b113-ad2afb5f8114/the_enzyme_factor_ebook_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/19081644503.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE12 5332 bytes
SHA-256: b48ef6c236578d719f0f1a975264c8dc9e3a1040a879f7504f89f29144c1ef44
font_01_sfnt_off0000e03f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03F 10488 bytes
SHA-256: c281c476c0204e7c4a5860998a733462456fc85507db49c73df21a86be622822

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