Malicious PDF — malware analysis report

Static analysis result for SHA-256 d07845381c2a99cd…

MALICIOUS

PDF

81.7 KB Created: 2021-02-18 14:55:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 9f31279896835af0e389759a99bf3228 SHA-1: 13eebb1148bd3f9470867ea99c4e17fe1c34255c SHA-256: d07845381c2a99cdc197da5a47333b1fc64283feb7f7cad3064c26adf4806f0d
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, suggesting a link farm or phishing campaign, with one prominent link related to resetting a washing machine. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest an attempt to manipulate search results or direct users to malicious sites.

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://baarspo.ru/123?utm_term=how+to+reset+washing+machine+panasonic PDF link annotation
    • https://cdn.sqhk.co/kelifevaz/ghOigig/72568437266.pdfIn PDF document text
    • http://inmyshtangen.xyz/division_worksheets_year_4_no_remaindersxuy3s.pdfIn PDF document text
    • https://mebotorafegamor.weebly.com/uploads/1/3/0/7/130739377/8231449.pdfIn PDF document text
    • http://rubka.space/begipedawizop78tji.pdfIn PDF document text
    • http://theplafond.xyz/mosekuzidaketuzisawiwigofgkcs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469116/normal_60241a7bde5b7.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvukidovime/Cihkie3/bakolajexakokugamu.pdfIn PDF document text
    • http://worldworkbook.com/swiffer_wetjet_wood_not_spraying60b6c.pdfIn PDF document text
    • https://cdn.sqhk.co/jadizefon/avhbvjK/51161486263.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/wegemebufojafak/finders_fee_agreement_template_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/kefatikuwa.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/nologagamedurajerodi.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/verilaxapulu.pdfIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/23725329841.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/egyptian_headdress_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/vovizufiponisa.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7C 5368 bytes
SHA-256: 66cdc15557ece13617ff57a17297804e22c370d05aa2b6d13437449616d1f986
font_01_sfnt_off0000fea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA8 11024 bytes
SHA-256: 166e19a286276e530e030c3acc009bd2aaa730248a4157701b641180250b4b48
font_02_sfnt_off0001240b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1240B 16148 bytes
SHA-256: d612c605d101522a7b082cd092ef78b209dae850c4a5e940dd0f53fb1bc5669f

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