Malicious PDF — malware analysis report

Static analysis result for SHA-256 889a17fd17707bb6…

MALICIOUS

PDF

75.4 KB Created: 2021-06-01 22:42:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 92abb55586b9e2d50544c4cb8115dd93 SHA-1: f67fbae7fc76c8694b15d8f155482aab3acb2154 SHA-256: 889a17fd17707bb69981619f036642a7826b79bac30f0a4bc9a0a1bba6b6d4ff
156 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as 'Pdf.Phishing.Trojan'. The document body, though heavily obfuscated, contains references to 'lfs s1 unlocker download', suggesting a phishing or social engineering lure. It embeds numerous external links, including a prominent one to 'nomylo.ru', likely leading to a second-stage payload or further phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://nomylo.ru/pbw?utm_term=lfs+s1+unlocker+download PDF link annotation
    • https://gubukaxonular.weebly.com/uploads/1/3/5/3/135349028/28ab0369bee7077.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372972/normal_602ed0d2541b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389820/normal_600edb0842e9e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366407/normal_5ff9eeb36bd71.pdfIn PDF document text
    • https://logosomuzabi.weebly.com/uploads/1/3/0/9/130969340/vemojumoja_vawajinareruz_sirotulaposogu_vijapawim.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4496816/normal_60b1e8f7e6634.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4408340/normal_60b2e6197c34d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427506/normal_6029640e7749b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451954/normal_6069e2d69f3cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494435/normal_5ff37dc1d5c3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450438/normal_601d03054c880.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406782/normal_60692e12335fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412158/normal_602a0d693baf2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449614/normal_5fda2c664294a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457868/normal_60462957f3b1b.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4376357/normal_60b44018986d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389095/normal_600783010b4e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369506/normal_60426d8f49e00.pdfIn PDF document text
    • https://jigukijovumide.weebly.com/uploads/1/3/0/7/130740363/belimo_boxufuvugibabis_vunazul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392209/normal_606a3e996a3e0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471948/normal_5fe1adede97a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366348/normal_5ffdca13d88e7.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/fb9ff09c-0cd1-40d4-af1c-3258a8242efc/venuwupokofuxaxakiwalesof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f85311e-0e1f-4e51-8673-b9a39132d9d5/how_to_support_equality_and_diversity_in_the_workplace.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90b7b965-d0de-422f-9d16-e4c6d8501279/stairway_to_heaven_backwards_satan.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_off0000e74c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE74C 5164 bytes
SHA-256: e13da3ec08b1a1a57b879876408acfb5217475d8d38164f15701aff35044fdf0
font_01_sfnt_off0000f90e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90E 11760 bytes
SHA-256: 95c8af85bfbb98f99ca87c2847a7187b85a108e617e07d6b2d7c0528c51241aa

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