Malicious PDF — malware analysis report

Static analysis result for SHA-256 fecf21820ca119dc…

MALICIOUS

PDF

53.9 KB Created: 2020-11-05 01:52:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: a53d96371a7b256b075bac4b3e7f543d SHA-1: 7e3d1a3a028753d12aecd7b61c4334dd69ae1499 SHA-256: fecf21820ca119dc4e7cb568c67ab397e2055038fc3280cd9fabd75fae55d6bf
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded URLs, with at least one identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious. The presence of numerous external links suggests a link farm or SEO manipulation tactic, aiming to drive traffic to potentially harmful sites.

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://gettraff.ru/123?keyword=china+coastline+length In PDF document text
    • https://lupolaluxu.weebly.com/uploads/1/3/2/6/132681144/1000023.pdfIn PDF document text
    • https://defejeve.weebly.com/uploads/1/3/4/3/134386135/ganufuv.pdfIn PDF document text
    • https://fulojozizarotuv.weebly.com/uploads/1/3/4/3/134318677/fidagopun_buwidajumaf.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/57cf5d6e-3e3a-4acc-9e6c-e9219df0ded3/vefisafaledijumo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfbc6409-8ed5-4b1f-9c0a-2b22ef6ae98b/bifegi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11b5b3d0-edfb-4a74-824d-ae6c5da8fa84/fevixegenajomofikiwujezub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c39f1603-029d-4f8f-b18f-6f5660345757/pouvoir_de_coupure_disjoncteur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2c94b99-0a96-4606-8cff-5b8a16d3bb99/ruritop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2a3617f-5968-4f2b-9a15-0b1eba7608fa/58303151252.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_off0000836d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x836D 4060 bytes
SHA-256: e120cd5bdf2a3b12ed792266629c60d82854f715c593c93455356c5f96d2461f
font_01_sfnt_off000091bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91BD 4868 bytes
SHA-256: 43f0a0ae71d7a82aa7746dd0a97947a7a72bf056abb47a7079dc44cf424c416b
font_02_sfnt_off0000a247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA247 12364 bytes
SHA-256: 20696ed34211f514dc49ab46e19e4039cb361a58941f94f77e3db38b054a61e7

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