Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbe1773748ea8f36…

MALICIOUS

PDF

66.2 KB Created: 2021-02-02 05:17:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 1b9db08f580b4e6fece0e342a2b7b7d9 SHA-1: f69049038c96ea8996fb8544b516f1edb047e28f SHA-256: dbe1773748ea8f36a384de8a58b4d6ca5abfd1be03f727cc2aadfffa0eb98b78
184 Risk Score

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 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.
  • 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://yafferge.ru/aws?utm_term=eular+rheumatoid+arthritis+guidelines+2019 In PDF document text
    • https://zupeloniz.weebly.com/uploads/1/3/4/0/134018773/5065285.pdfIn PDF document text
    • https://koxizekeb.weebly.com/uploads/1/3/4/7/134770308/sejal.pdfIn PDF document text
    • http://mrt-zdes.ru/305006146942yrar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495975/normal_600729d71800d.pdfIn PDF document text
    • https://xevekefipozi.weebly.com/uploads/1/3/1/4/131406281/e2808abd39.pdfIn PDF document text
    • https://nojabepeteguki.weebly.com/uploads/1/3/4/6/134669956/foxisizegupo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482402/normal_5fc941b0d57db.pdfIn PDF document text
    • http://pubguckazan.com/rock_out_hand_signalwgaj6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://giwalawap.epizy.com/w10_bridge_rectifier_datasheet.pdfIn PDF document text
    • http://bunokupisosep.epizy.com/amazfit_stratos_watch_face_apk_install.pdfIn PDF document text
    • http://zuzojep.rf.gd/jifepo.pdfIn PDF document text
    • http://mulexotuvatago.epizy.com/email_format_english_cbse.pdfIn PDF document text
    • http://topemuzopapegu.epizy.com/dolce_gusto_coffee_machine_guide.pdfIn PDF document text
    • http://lilivuxaja.rf.gd/81914927306.pdfIn PDF document text
    • http://sexomiluvimuke.rf.gd/casia_v2_dataset.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_off0000c64a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC64A 5680 bytes
SHA-256: dbe3b0c9045d8c2132282cbe42d55efcca5e5cc8dafb55ec74027c46788d23cd
font_01_sfnt_off0000d96c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD96C 10028 bytes
SHA-256: 15a2f14520b5a89a7a6fee9bf10870e85c7d52f4de8a4a67e8e265cbbb00d3ef