Malicious PDF — malware analysis report

Static analysis result for SHA-256 230b6235f22f5a18…

MALICIOUS

PDF

75.4 KB Created: 2020-10-01 15:11:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 10cfa79f4f5507c1d57e2eb1f165f13c SHA-1: ed6bd903527edf6d150ec474841866ba472de9af SHA-256: 230b6235f22f5a18d314a7e0ee96ef3e85bca27abef145727a5040f8ecf864de
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the redirector. This suggests the primary purpose is to redirect the user to malicious infrastructure, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://ggtraff.ru/strik?keyword=amphioxus+journal+pdf In PDF document text
    • https://site-1039270.mozfiles.com/files/1039270/novibitavoxe.pdfIn PDF document text
    • https://site-1037124.mozfiles.com/files/1037124/guxowifazewazom.pdfIn PDF document text
    • https://site-1036640.mozfiles.com/files/1036640/disuwiw.pdfIn PDF document text
    • https://site-1037044.mozfiles.com/files/1037044/wivoxunupilenofuz.pdfIn PDF document text
    • http://files.woodlandindianart.com/uploads/1/3/1/4/131437138/165215.pdfIn PDF document text
    • http://files.nenagholympic.com/uploads/1/3/2/6/132682076/wajub.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6083/8050/files/kezajidalelibesorom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7539/3946/files/zebozoxesuriwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3041/3475/files/81110690209.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8061/4041/files/lamberghini_doorbeen_audio_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1786/9211/files/38537279008.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/1049/0277/files/67944474963.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2635/7160/files/kincade_fire_cal_fire_report.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_off0000e78c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE78C 5412 bytes
SHA-256: 490e3e5ad2699a72b62f6a4a375ea3b1469beb217d564b3948197b5c11de002e
font_01_sfnt_off0000f9ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CE 11212 bytes
SHA-256: edaa0f4b1048847c3f3773d14c4eb3172cf9ea73e4b5a5b0a252ec7fefd07f6f

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