Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ddc9bf1d1667c88…

MALICIOUS

PDF

77.5 KB Created: 2021-02-16 21:31:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8d76dc53ea0eaae5cb1f81171d8c44fc SHA-1: 343244ef9cdfff1f864a727cf64c03057f4fff0f SHA-256: 2ddc9bf1d1667c88c43d56b973fb52d973b7009abf222e0b1b14e89e9c4626ae
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The heuristic PDF_SEO_LINK_FARM indicates the presence of a large number of external links, suggesting a link farm or phishing lure. The embedded URL 'https://jottigo.ru/123?utm_term=does+alexa+answer+in+spanish' is a primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/123?utm_term=does+alexa+answer+in+spanish PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4498882/normal_5fda060971d2e.pdfIn PDF document text
    • https://bipovubukixepev.weebly.com/uploads/1/3/2/7/132740720/3266155.pdfIn PDF document text
    • http://merekidade.22web.org/xunig.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493578/normal_5fe24b8016719.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404524/normal_5fdea054916f7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389108/normal_5ff164985df12.pdfIn PDF document text
    • https://duxuxapuxud.weebly.com/uploads/1/3/5/3/135332588/bukez.pdfIn PDF document text
    • https://dizilezojo.weebly.com/uploads/1/3/4/2/134234798/nuvirala-saludizal-serupenikexon-tojanir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393353/normal_60057c9d9e5eb.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://s3.amazonaws.com/lunojol/pakuxi.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/missguided_bandeau_fishtail_maxi_dress.pdfIn PDF document text
    • http://bividit.rf.gd/9993320563.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/duwubapezafenasuxopak.pdfIn PDF document text
    • https://s3.amazonaws.com/liluvad/zoxetamevaji.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/neviwifavamododamelawo.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/68535822888.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/either_or_neither_nor.pdfIn PDF document text
    • http://donolipapaxe.rf.gd/96438661767.pdfIn PDF document text
    • http://dofadedivuxira.rf.gd/rubewajusizokivapenovuno.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/70504661041.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/41198162682.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_off0000e406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE406 4772 bytes
SHA-256: 55a58e8adc01ca5fb8f840e849944027ef0806516e0ffa0843d259326e286094
font_01_sfnt_off0000f431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF431 11160 bytes
SHA-256: 7436eac4beb2487fe850602840789cde2910b3073d3acc3543501585ad7a892d
font_02_sfnt_off00011925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11925 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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