Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d0d21f628ba1ab3…

MALICIOUS

PDF

43.2 KB Created: 2020-09-30 20:29:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9604d677b82db392330c0abafd23b3a3 SHA-1: f124968c594c6652258e73c8143abaf750cbff89 SHA-256: 0d0d21f628ba1ab36baf9d0577994cdaf09a624cb4e5cc45fb94d10dc3eb5f3c
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically a URL designed to appear as a search result. The ML classifier strongly indicates maliciousness, and the presence of numerous external links suggests a link farm or redirection scheme. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive document.

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://cctraff.ru/strik?keyword=dr+babasaheb+ambedkar+books+pdf In PDF document text
    • http://files.patsydonovan.net/uploads/1/3/1/4/131407061/5d833fa42b.pdfIn PDF document text
    • http://files.ezservicelist.com/uploads/1/3/2/7/132741110/pefesepo_vatikuzaxojux_moxurabeluri.pdfIn PDF document text
    • http://rawozeref.debbieyoung.co.uk/uploads/1/3/1/4/131406798/8193974.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/be511a26-9e78-4a37-858d-431da95563c3/fetujixovewilegexuwaxamex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1364749-e43f-492b-b78e-ef6e57b63c36/82291729948.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d37a6d9-a14c-4df8-97a0-323c4172f234/mijumolalowijurazek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02a2425a-eaf2-4c3a-80a9-c6858b613722/30031380169.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bad2093-4b3e-4afa-bc87-f75ae6c0f7fd/kupewumugumubozolara.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0935/1578/files/lebepozadoxovo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3041/3475/files/rotevopunudogowidukoru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8762/5369/files/fezasogojezexuvogi.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_off00006241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6241 5452 bytes
SHA-256: c80265515dd89eb9b96933643c72337e8949ae4e8f22450612364749ac87b7a9
font_01_sfnt_off00007491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7491 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off00007d1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D1F 10088 bytes
SHA-256: d337f8e017acfcaf6621c80299b8a5749dc3c2bd3fe621fe6bc3a9087cccf7b3

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