Malicious PDF — malware analysis report

Static analysis result for SHA-256 86386ebd4bb1de1e…

MALICIOUS

PDF

68.4 KB Created: 2021-03-24 16:12:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 09b34fd443a69221c85d5b1bd4a51b3b SHA-1: 855e9f684f1501284ba7afcde7c7d262a28a8806 SHA-256: 86386ebd4bb1de1e34a1f9aa4e853871e9a16f710b3618b5c173e9b7380cb028
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by both heuristics and a machine learning classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate an attempt to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://jacksth.ru/123?utm_term=kiboko+by+aganaga+ft+chameleon PDF link annotation
    • https://kibapeti.weebly.com/uploads/1/3/4/5/134515129/gaxizudexeza_xomapi_palezutitebox.pdfIn PDF document text
    • https://dodilepu.weebly.com/uploads/1/3/4/4/134444379/mosibarizoja.pdfIn PDF document text
    • https://posesisex.weebly.com/uploads/1/3/5/3/135332701/b992256d233.pdfIn PDF document text
    • https://manasuxejorodi.weebly.com/uploads/1/3/1/6/131606962/b7c81267a5dd2a.pdfIn PDF document text
    • https://rimalelor.weebly.com/uploads/1/3/4/8/134857757/gomupasixibufa.pdfIn PDF document text
    • https://poxesaxe.weebly.com/uploads/1/3/0/7/130738711/jamutalonidepelemiro.pdfIn PDF document text
    • https://texoxarisozitew.weebly.com/uploads/1/3/0/9/130969357/dubexidujarez.pdfIn PDF document text
    • https://tanedozuwo.weebly.com/uploads/1/3/4/6/134644204/6075875.pdfIn PDF document text
    • https://vudaxevagi.weebly.com/uploads/1/3/4/2/134234865/7797614.pdfIn PDF document text
    • https://dodanopo.weebly.com/uploads/1/3/1/4/131408738/8865807.pdfIn PDF document text
    • https://nawodovifuvobix.weebly.com/uploads/1/3/0/9/130969758/jonuxazofamuxepixu.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/ketip.pdfIn PDF document text
    • https://gitaxawisar.weebly.com/uploads/1/3/2/8/132814742/sijefe-ponususijo-lanaj.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/dupula/crs_domestic_reporting_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b79dfff-0e3e-4895-a3c7-9bbcbfb66d8d/amantes_pizza_delivery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dd313af-0cb9-4252-a50a-46d44020f66d/97654788085.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/lesobikomamazawajilawemo.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_off0000cf7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF7B 5296 bytes
SHA-256: 6891292e9bc84c86adb18f3649173be9fc558a99b40b5ba41a962d99faa6efe2
font_01_sfnt_off0000e177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE177 10240 bytes
SHA-256: b3d82de63dba09dec299c445152f6c952b6e1c61c9ad31b1cf196c5477ac8271

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