Malicious PDF — malware analysis report

Static analysis result for SHA-256 12ca5b9176b101c5…

MALICIOUS

PDF

75.8 KB Created: 2020-11-13 05:57:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: eef9b803891990553f3f194ac3d22d3b SHA-1: de9147a2b3863ecc5eeff3b1aae49f5eefeb5a06 SHA-256: 12ca5b9176b101c51abd8f5dd93a7afc467b8e06a266f71ac94192b5b87608d2
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffking.ru/123?utm_term=grease+live+script+pdf PDF link annotation
    • https://lorebigida.weebly.com/uploads/1/3/4/3/134377432/puzaki.pdfIn PDF document text
    • https://tilawebaxipas.weebly.com/uploads/1/3/4/5/134576196/nagizadimudajipu.pdfIn PDF document text
    • https://lukizodik.weebly.com/uploads/1/3/4/4/134458766/1080992.pdfIn PDF document text
    • https://lituveso.weebly.com/uploads/1/3/4/3/134362288/perodavefu.pdfIn PDF document text
    • https://xegiwisupanax.weebly.com/uploads/1/3/4/3/134367095/7718fe9a184.pdfIn PDF document text
    • https://valezofijamope.weebly.com/uploads/1/3/4/4/134445284/gosegaravixo_likelujubumet_dogozotufomitu_wovunarukelu.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/5ad60e07-7644-4042-a2b9-bea8368b71e4/mapa_de_actores_turismo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9ec635f-5a08-45c2-9293-d40273231189/gulogoxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dba788c-19a4-42df-81c3-f82c6d306e37/89345379565.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02e4bcb6-7ec3-4d69-b5b3-96b6f1b2ac7b/tarot_of_the_bohemians_papus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1414f91e-5a6e-422d-a331-8a021f4053ec/delete_chrome_history_search.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/534d1122-1cd0-4d44-9ffe-d52525b64633/silalarofofekitekip.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/brother_cs-6000i_instruction_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8685545-b452-4265-a436-655e28db524d/92506737399.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD844 5240 bytes
SHA-256: e2eb5f5a12adfa955a5c6b7aadeb671b09b2b79ba48e47f0b5ec133b39866e9a
font_01_sfnt_off0000ea33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA33 10308 bytes
SHA-256: acf739df2a0db1c0d0753d5543c7d277ac1ccdb8cd1776299845f8b5c7df869e
font_02_sfnt_off00010dce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DCE 16060 bytes
SHA-256: 5b45d8957cdd618c0f157c507058aef1810e6158bb3d1abf257796d6008f54d1

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