Malicious PDF — malware analysis report

Static analysis result for SHA-256 96bd445823e784fd…

MALICIOUS

PDF

88.7 KB Created: 2021-02-04 13:18:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 8ff8c999d669411401f06861d94f0591 SHA-1: c61650c0db6d26e75746ee05c76b7d1762d0ae50 SHA-256: 96bd445823e784fd225e4969663a3245f1d7090f229a30404d79d4432400a309
156 Risk Score

Malware Insights

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

The PDF file was flagged by a ML classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains a large number of external links, with one pointing to 'https://bologen.ru/aws?utm_term=black+snake+moan+full+movie++480p', likely a lure. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it may attempt to download or redirect to malicious content, potentially leveraging JavaScript for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/aws?utm_term=black+snake+moan+full+movie++480p PDF link annotation
    • http://vakexuk.22web.org/livikepotadamijuxelibeli.pdfIn PDF document text
    • https://direwuberegenis.weebly.com/uploads/1/3/4/3/134361890/122497.pdfIn PDF document text
    • https://bugotenopiziwa.weebly.com/uploads/1/3/0/9/130969298/49682791c.pdfIn PDF document text
    • https://duwafozadujazak.weebly.com/uploads/1/3/1/3/131380008/c0fb15ec242.pdfIn PDF document text
    • https://likifovufuli.weebly.com/uploads/1/3/4/5/134588617/7011242.pdfIn PDF document text
    • http://fugoverud.iblogger.org/damascus_md_weather_report.pdfIn PDF document text
    • http://kepojitu.22web.org/doxezebukepafuwatodepevi.pdfIn PDF document text
    • https://sumomaduge.weebly.com/uploads/1/3/4/8/134884200/87f4e563c.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/bufexa/jupiter_dynamic_bond_fund_fact_sheet_usd.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/identifying_adjective_and_adverb_prepositional_phrases.pdfIn PDF document text
    • http://nodefojabotozij.rf.gd/costing_sheet_tcode_in_sap.pdfIn PDF document text
    • http://monuwuwotivonil.epizy.com/86053483614.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/conneaut_ohio_weather_report.pdfIn PDF document text
    • http://divimoxigorube.epizy.com/molecular_genetics_and_metabolism_reports_impact_factor.pdfIn PDF document text
    • http://xegefonupekowa.epizy.com/wadigiwolako.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/bipolar_mood_disorder.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_off00010df6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF6 5464 bytes
SHA-256: 754c45260d218ae584f1b35c133f7bec517ae0675abce2ef5617b9fac1dbfd8a
font_01_sfnt_off00012080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12080 11824 bytes
SHA-256: b513a22d9e5005f20f7c22146c8604824a7754659c0e635bb3be03a5598341fe
font_02_sfnt_off00014740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14740 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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