Malicious PDF — malware analysis report

Static analysis result for SHA-256 01ad9d667022df39…

MALICIOUS

PDF

71.2 KB Created: 2021-04-05 19:29:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: a53a48571a5484c687742088e63e218e SHA-1: 4a01293476c2261703a2859a633f029c8bd5e4da SHA-256: 01ad9d667022df394fd8ebd1f8fc4ab30bada84666a86dcfcb4a64f530e4eea2
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classification and ClamAV, flagging it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, which is characteristic of SEO spam or phishing campaigns. The document body is heavily obfuscated, but the presence of numerous external links suggests a primary function of redirecting users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/wix?keyword=hieu+trung+nguyen PDF link annotation
    • http://sevoxotedeki.medianewsonline.com/jojiwipebi.pdfIn PDF document text
    • http://wedasuf.getenjoyment.net/safetokit.pdfIn PDF document text
    • https://kufavugozit.weebly.com/uploads/1/3/5/3/135309998/447453.pdfIn PDF document text
    • https://tezilejesitox.weebly.com/uploads/1/3/1/1/131163634/9245147.pdfIn PDF document text
    • https://rexirarilabe.weebly.com/uploads/1/3/2/6/132681411/6750056.pdfIn PDF document text
    • http://womirewuzakuf.sportsontheweb.net/bachianas_5_partitura.pdfIn PDF document text
    • https://febelozo.weebly.com/uploads/1/3/4/5/134599394/5726785ac338b3.pdfIn PDF document text
    • https://sarisakela.weebly.com/uploads/1/3/5/3/135308925/628a112949bc7a8.pdfIn PDF document text
    • https://gematisi.weebly.com/uploads/1/3/4/5/134599806/df05eac.pdfIn PDF document text
    • http://fidesuwuranotif.getenjoyment.net/5800904930.pdfIn PDF document text
    • https://xotufidew.weebly.com/uploads/1/3/1/8/131856134/96bc69c7d95087.pdfIn PDF document text
    • http://rumurel.mywebcommunity.org/77169615993.pdfIn PDF document text
    • https://bumaxaxup.weebly.com/uploads/1/3/4/2/134235918/bb95e7a05b01d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a867a740-3546-49c9-bb92-c76f735cad7e.filesusr.com/ugd/c312ff_edd5068b18b043dea9ac6e526fca3042.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dalava/23160057992.pdfIn PDF document text
    • https://28546a20-d0cc-4b82-bb4f-6711990cd5a3.filesusr.com/ugd/0bcf16_182ad5d671da4d41b384272b8b2f27b1.pdf?index=trueIn PDF document text
    • https://1864c106-1a4f-4194-99fb-dabd5a0af450.filesusr.com/ugd/17b194_f4c2bdc974654f57b40c17eec6e7afb1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/zokafuje.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/coordinate_plotting_shapes_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/91634242304.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/12872955474.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_off0000d8cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8CF 4496 bytes
SHA-256: 593862bfd532aa14d395e362f1dc870176774759b88c83bb2ca432792811e170
font_01_sfnt_off0000e836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE836 11072 bytes
SHA-256: 1cc4f8f8e59de85c3935ce5004f086236698b0e0b37772adb1fedfe97d4e83b9

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