Malicious PDF — malware analysis report

Static analysis result for SHA-256 dde6c6a453774452…

MALICIOUS

PDF

70.5 KB Created: 2020-11-23 16:23:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7fae56bc01b7daefdcf40825fa8873e2 SHA-1: d85e619c37d99ce26f51a1a409dad2581e6f32d6 SHA-256: dde6c6a45377445249c841e6d3dbb69f7cd71399fddfc8b3b2c135933070af39
156 Risk Score

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 0.9995

Heuristics 5

  • 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.
  • 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://trafffi.ru/strik?utm_term=numeros+cuanticos+y+configuracion+electronica PDF link annotation
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/3431514.pdfIn PDF document text
    • https://gedobelega.weebly.com/uploads/1/3/4/3/134375191/nidojugogoxeloxuzos.pdfIn PDF document text
    • https://jesokalatozu.weebly.com/uploads/1/3/4/5/134591365/6f91c7.pdfIn PDF document text
    • https://risimukino.weebly.com/uploads/1/3/1/3/131383953/2828127.pdfIn PDF document text
    • https://junoxavod.weebly.com/uploads/1/3/1/3/131384771/6265602.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/673c82dd-eae0-4305-8cdb-870985ae8116/toxotimufe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81e70388-d74d-405e-97ea-be6fbe318239/49250157808.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/21133277317.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/dijokaxunupumura.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/kemopuzilidot.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_off0000c610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC610 5156 bytes
SHA-256: 8c4ff3f4457433a4bb9a027eb46d2ad07da4928da0f0717b8601ee9c64639ae1
font_01_sfnt_off0000d78b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD78B 11708 bytes
SHA-256: 1a0b045cbb8f8fa898c132aebd4b0d1512cb2b2a183ebb2513dfd5cc5333a377
font_02_sfnt_off0000fd7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7D 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e