Malicious PDF — malware analysis report

Static analysis result for SHA-256 8950ce283a012916…

MALICIOUS

PDF

77.1 KB Created: 2020-12-25 00:54:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 672394b7d24987b58e7041813e979169 SHA-1: 7232317a6248c1354b90bde45baa330d04cc3424 SHA-256: 8950ce283a01291668d0c66d7ff6b3417924578406a3c6e118ea98cdddc0bf3e
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with critical heuristics identifying it as a malicious redirector and part of a link farm. The ML classifier strongly indicates maliciousness. The presence of embedded URLs and the nature of the heuristics suggest an attempt to lure users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=take+ivy+pdf In PDF document text
    • https://cdn.sqhk.co/zofukumane/gdribnw/death_truck_hero_apocalypse_road.pdfIn PDF document text
    • https://cdn.sqhk.co/dusimefosix/R7IOyU1/44397538208.pdfIn PDF document text
    • https://cdn.sqhk.co/zolaxadivowe/dhcigeB/torovimodigebizanip.pdfIn PDF document text
    • https://cdn.sqhk.co/sakiforivona/ieQAgjk/forasixalizutumigufumuxal.pdfIn PDF document text
    • https://wukonoru.weebly.com/uploads/1/3/4/4/134441013/69d6df3.pdfIn PDF document text
    • https://cdn.sqhk.co/taduzotul/ichghi0/46159267543.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/free_kindle_books_mobi_format.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/32163623061.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b251ab2-cc52-4bc5-8901-8bf98eda3ccf/how_to_delete_emails_from_gmail_trash_on_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97955017-2018-469b-b7fa-3593624f1ad3/6705482809.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/can_t_chrome_on_macbook.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/list_of_common_similes_and_metaphors.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e59a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE59A 3568 bytes
SHA-256: 0adb19acabc301061dcf1477c6e8b9ef223b95cfe3fab10df32a80c929471e43
font_01_sfnt_off0000f250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF250 4904 bytes
SHA-256: e6faac8b2e37cf9936976ed702c848f4af0268d93bfffce327915283d3b24dfc
font_02_sfnt_off00010330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10330 10668 bytes
SHA-256: 6e6e5508badac778cb1714a3c2d0937044a808fc91bb710110fa5cf7a73efbae

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