Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7b115017d4d2259…

MALICIOUS

PDF

88.7 KB Created: 2021-02-25 06:13:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f2b3880381923cf8ba8c393e1fc7eab4 SHA-1: ec941e0cb3b3117dbd5b9718cfcf85116c154b4c SHA-256: e7b115017d4d225904176cd71b31de4de9b98cbe0d5329ef69fae8cd470d05d7
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The presence of external URIs and the overall structure point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/123?utm_term=thermaltake+core+v1+size+comparison PDF link annotation
    • http://xajozixav.iblogger.org/86474877554.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474169/normal_6001e3d14cda2.pdfIn PDF document text
    • https://turugoduzo.weebly.com/uploads/1/3/0/7/130739986/ludefipukaxijaxubu.pdfIn PDF document text
    • https://voruvagozi.weebly.com/uploads/1/3/4/7/134742827/ce4b3.pdfIn PDF document text
    • http://jidugisukeranav.iblogger.org/pro_forma_financial_statements_template.pdfIn PDF document text
    • https://momuxubodi.weebly.com/uploads/1/3/1/3/131379397/kumesatapaze-sajap-zidubakorudoju.pdfIn PDF document text
    • https://taxajefikudo.weebly.com/uploads/1/3/4/7/134765143/mavejemolufomik_kinuxidi.pdfIn PDF document text
    • https://xurebutira.weebly.com/uploads/1/3/2/6/132681359/zuzetegekugot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455406/normal_6028691143acc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485570/normal_5fcf15ed0bc6f.pdfIn PDF document text
    • https://cdn.sqhk.co/duravukikemo/zuCXjae/discount_calculator_soup.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
    • http://jiliwajomagob.rf.gd/how_much_hydraulic_fluid_does_a_ford_3000_tractor_hold.pdfIn PDF document text
    • http://ralirajuz.atwebpages.com/free_bitcoin_money_adder_activation_code.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE058 7120 bytes
SHA-256: c54436f3011942a43c986f27c183b2cbdebd89267e934fc92a5e8e72b4221cf1
font_01_sfnt_off0000f85f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85F 5136 bytes
SHA-256: 058d7d74a02bcbbb5a92ef511087b72c3d79e0a8043b30780799589583de21dc
font_02_sfnt_off000109b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B4 11068 bytes
SHA-256: c1dabe757cdff8551aebe23270a7c41374e54c1ed6e422a912f0a2a627d4f80f
font_03_sfnt_off00012fb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FB6 16204 bytes
SHA-256: 581c0268a3cc9df95828ceb030693f64bcb03969c1cab585f80954d7fb3b146d
font_04_sfnt_off00014506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14506 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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