Malicious PDF — malware analysis report

Static analysis result for SHA-256 20123289ed92fa74…

MALICIOUS

PDF

94.4 KB Created: 2021-05-27 14:41:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e20466353176d513d645c5813fbaa253 SHA-1: 1fdf9ed5298f2c3bed789dc47848100cf0ee923a SHA-256: 20123289ed92fa74ceeceb9a4f333a11de0096a0eea113653fa4d56486f9509e
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • 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://crophysi.ru/strik?utm_term=downloadable+body+measurements+chart+for+weight+loss+pdf PDF link annotation
    • https://rilodogalaru.weebly.com/uploads/1/3/4/3/134398508/widutagikasug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444850/normal_5fd11286e83f3.pdfIn PDF document text
    • https://wifaborasumekig.weebly.com/uploads/1/3/2/6/132695644/6403518.pdfIn PDF document text
    • https://kakulekatorud.weebly.com/uploads/1/3/4/6/134681497/dolawokefirujuwa.pdfIn PDF document text
    • https://zajevikafe.weebly.com/uploads/1/3/5/2/135297545/fujetigago_genutito_bokikejuwikama.pdfIn PDF document text
    • https://jikumudepopojet.weebly.com/uploads/1/3/1/4/131453433/kevizabokiterisugi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493888/normal_5fffaf5613936.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500446/normal_5fcf0b7a10c4d.pdfIn PDF document text
    • https://dovedesomubax.weebly.com/uploads/1/3/4/4/134487211/9f79c.pdfIn PDF document text
    • https://voxapuxunud.weebly.com/uploads/1/3/1/3/131381802/911d250959.pdfIn PDF document text
    • https://vepazigomopu.weebly.com/uploads/1/3/4/3/134398405/7304894.pdfIn PDF document text
    • https://kigatuxusim.weebly.com/uploads/1/3/5/3/135305206/1702407.pdfIn PDF document text
    • https://tasakexer.weebly.com/uploads/1/3/4/6/134669330/70d3d561a.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/7c6f2b18-74a7-426f-be0b-e9cc69bfb9be/88420290108.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/968bcc5d-2f7f-4dab-b877-a4fa08f19cf6/how_to_use_weber_spirit_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6aecdd4-e4ff-4e4a-8075-142dd96e5324/28241852569.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/009ec238-1521-49f1-a8fb-252171f5da61/70858136637.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1811331-1f68-4aaa-bc4c-860cbded8f99/vobodazubovogawawirasa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8798dbe8-0ea6-4b3b-b94b-872ee5cb5fd4/rafig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7f2b556-6464-4908-9e82-aadf8d6f6d4e/sudovitugesisatisidugan.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_off000131ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131BA 5904 bytes
SHA-256: cb8be1baac04a3505e4a47730d3e54957a7a934517073f53b898a3e7363c5189
font_01_sfnt_off000145c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145C3 11136 bytes
SHA-256: 7ab5e8b9251797fcb63b524548328ccd65ce15656dade21a165dd0310f902f30

Open this report in the interactive analyzer, or submit your own file for analysis.