Malicious PDF — malware analysis report

Static analysis result for SHA-256 e907c948b04874b3…

MALICIOUS

PDF

75.2 KB Created: 2021-02-18 08:51:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 93c1f2317ca2e4f2add2855b956d1a75 SHA-1: 38be3539c3f9ccefd867aa4fd118584051a97458 SHA-256: e907c948b04874b34d7eb23d582dd6485cfb9c410ec1694fc75439736fb29645
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, indicative of a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards an attack pattern involving redirection to potentially malicious websites.

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
  • 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.
  • 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://leonvi.ru/123?utm_term=sports+illustrated+swimsuit+model+photos+ebay PDF link annotation
    • https://cdn.sqhk.co/joxutedunik/inih3eC/chicken_lollipop_full_hd_wallpaper.pdfIn PDF document text
    • https://gatokoliza.weebly.com/uploads/1/3/0/7/130739470/8523357.pdfIn PDF document text
    • http://tibetterrier.ru/673964287760yh1f.pdfIn PDF document text
    • https://cdn.sqhk.co/filomada/fhgjiNC/junosaxo.pdfIn PDF document text
    • https://cdn.sqhk.co/zasemewiti/Ftjg4VH/mepolar.pdfIn PDF document text
    • https://cdn.sqhk.co/fokofike/cjepji8/jofodevekimalox.pdfIn PDF document text
    • http://lezapogogaz.iblogger.org/manual_de_auditoria_financiera_cgr_peru.pdfIn PDF document text
    • https://cdn.sqhk.co/jadepibake/ehfghWN/38363257049.pdfIn PDF document text
    • http://ultra0.space/pexibext7ng7.pdfIn PDF document text
    • https://cdn.sqhk.co/kugorazig/YzIhegj/metro_boomin_flute_sound_pack.pdfIn PDF document text
    • https://cdn.sqhk.co/guzowozuk/agcig8C/woxixifigeb.pdfIn PDF document text
    • http://artyom.guru/52177304158qjgx8.pdfIn PDF document text
    • https://cdn.sqhk.co/kexofebiziv/iZz9Vbv/grow_credit_union_contact_number_manchester.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wujukigow.rf.gd/zujap.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_off0000e782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE782 5636 bytes
SHA-256: 01ba406d4db0ea9f85debbbd49982730b862edaca8fae0aded7a63a8e46bed4e
font_01_sfnt_off0000fa92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA92 10816 bytes
SHA-256: 7af3c922dce88ce9062693190aecb99f8b9a6603a3e469adbb689c819c0e18dc