Malicious PDF — malware analysis report

Static analysis result for SHA-256 18092a3435801e2e…

MALICIOUS

PDF

75.4 KB Created: 2020-11-20 04:23:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 877cdb0bf043406b621d92c555b78a81 SHA-1: 7db2802d37afbc4c8dba546c5abc602343e9a209 SHA-256: 18092a3435801e2e493a3a30edafc53f2415b5e19884ff8e4bbfd62f7e87f4ff
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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafficel.ru/aws?utm_term=balu+movie+songs+free++telugu PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370746/normal_5f890d887332c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370744/normal_5f95a13c40e9a.pdfIn PDF document text
    • https://puwegamojone.weebly.com/uploads/1/3/4/7/134702565/tenos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365601/normal_5f8e4de20e668.pdfIn PDF document text
    • https://lejoxenususoja.weebly.com/uploads/1/3/4/4/134497781/gaxedob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379035/normal_5f97299f33617.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wofaxil/82607200931.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/33527057320.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/nemebiruropota.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/10353723217.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/worksheet_1_atomic_spectra_key.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_off0000d8d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D1 5424 bytes
SHA-256: 9090b39333da74176aa1cb38a0c89856f6dcfff97bfa378e72630afb25cb6e91
font_01_sfnt_off0000eb09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB09 5196 bytes
SHA-256: f522a8091621fc78d4d77c5b3d2e1df5120aaa955665fd41e172b12e7d7b09ca
font_02_sfnt_off0000fcab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAB 10568 bytes
SHA-256: 305acc28a2cccd7349f4831b68bd603b83ce52b89e7306e32d34b23e66dea267