Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ede2a850b18c3d3…

MALICIOUS

PDF

47.0 KB Created: 2020-10-03 05:25:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b2500c06b36c555eac1527e525cd111b SHA-1: 5a4b26893bcbcaee81be9812fa061e6939360f4c SHA-256: 0ede2a850b18c3d3a44be28bb1a30754aaf861760de6154e5a259dc99e556e9f
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of links, many pointing to disposable hosting, and one specifically to a known malicious redirector. The document body text, while obfuscated, contains keywords related to hacking and command execution, further supporting the malicious intent. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of it being used for malicious purposes, likely to redirect users to exploit kits or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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.
  • 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=hack+wifi+dengan+cmd+android In PDF document text
    • http://files.colleenwood.com/uploads/1/3/1/1/131163533/683cd4a11ab76b.pdfIn PDF document text
    • http://nijexaz.championcamp.net/uploads/1/3/1/8/131871674/komazanugid-wozagotetavel-laxenorudomeb.pdfIn macro / runtime command snippet
    • http://luwap.fosteringforwardmi.org/uploads/1/3/1/1/131164439/vojemakev.pdfIn PDF document text
    • http://files.ultimatemarinepower.com/uploads/1/3/1/8/131872298/4393110.pdfIn PDF document text
    • http://files.berncograssrootsdems.com/uploads/1/3/2/6/132695601/8d8ed89223c.pdfIn PDF document text
    • http://files.rickspearsart.com/uploads/1/3/1/4/131453945/gokanuwasegowopij.pdfIn PDF document text
    • http://gosena.laurelschool.ca/uploads/1/3/1/0/131071196/86a6b29a1a.pdfIn PDF document text
    • http://povalugi.mindfulmusicacademy.com/uploads/1/3/1/4/131453133/3110194.pdfIn PDF document text
    • http://files.colleenwood.com/uploads/In macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf3793b5-c4e3-46db-8069-5cf55fef6170/2440323809.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e253f4d1-8cc5-4c72-a91c-6783c47a9b11/pesivanebureraze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e4798fb-c4e0-44ea-a17e-b8a0cd4be439/bazudawosis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae30023a-8593-4278-b7b4-faad6493fe9e/sopozagisajoniwilitesel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd872392-8ccf-4523-9ba8-e42c25d61311/jemelave.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8357/0078/files/97857359299.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2405/1107/files/no_excuses_the_power_of_self-discipline_in_hindi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9732/5732/files/ejercicios_de_teorema_de_pitagoras.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_off00007b7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B7C 5248 bytes
SHA-256: a48d71bc48ba03efc5ce9e5708e2e40b5d40d9b3e661b61762065a715c6b1d28
font_01_sfnt_off00008d53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D53 9916 bytes
SHA-256: 774dac3022efd89a2ce3b766f26a85e8f8b319d586d8d1dcb4b35b11669fa102