Malicious PDF — malware analysis report

Static analysis result for SHA-256 07757245fce56996…

MALICIOUS

PDF

84.1 KB Created: 2021-03-30 11:37:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd820cfe016e1eb250c24ca032e69135 SHA-1: 75c99ecc601139d1fca771b84aec7ba1dd8bec78 SHA-256: 07757245fce56996773241c65128c9dc9ddd61a86739cdc379d9535ef6090748
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers, exhibiting characteristics of a phishing or link farm attack. The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. The embedded URLs suggest an attempt to direct users to potentially malicious or SEO-manipulated content. No scripts were extracted, but the presence of numerous external links indicates a likely attempt to lead users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/wix?keyword=storm+the+house+3+guide
    • http://kukushka.space/tipos_de_tijeras_quirurgicass2zes.pdf
    • https://cdn.sqhk.co/vekuzajomugi/Pgccjhv/wodufajupeperafo.pdf
    • https://cdn.sqhk.co/pilozarager/hgWaihe/figubukolataropov.pdf
    • https://static.s123-cdn-static.com/uploads/4450048/normal_5fe53ba07972b.pdf
    • https://rexawalifutox.weebly.com/uploads/1/3/4/4/134458468/zinipinapaxat-fobafukafox.pdf
    • http://hopecommunitynaz.com/xejurivud4buu.pdf
    • http://yesnutural.space/vugikiwafufesasugevelefulpqtz3.pdf
    • https://cdn.sqhk.co/bozadukopufu/hGSieVg/group_4_model_question_paper_and_answer.pdf
    • https://xadajosawot.weebly.com/uploads/1/3/1/6/131636584/9427527.pdf
    • https://cdn-cms.f-static.net/uploads/4488116/normal_5fd7ed9f5ba38.pdf
    • https://cdn.sqhk.co/bolomadu/mgi7hir/21417221825.pdf
    • https://cdn.sqhk.co/mozulunilex/u8idHgh/wewivude.pdf
    • http://greatholl.com/dell_latitude_d820_maximum_ramlbbdx.pdf
    • https://static.s123-cdn-static.com/uploads/4408987/normal_5fee32ec4979b.pdf
    • http://best-ital.fun/dilwale_dulhania_le_jayenge_torrentkygfb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/b91d10bb-6bc9-40b9-aecb-49e90327f97a/craftsman_1_3_hp_2_gallon_portable_air_compressor.pdf
    • https://uploads.strikinglycdn.com/files/f2ad5e8f-4834-4440-ac9c-be1e24f780f1/pentair_superflo_pump_leaking.pdf
    • https://uploads.strikinglycdn.com/files/a7df7e3d-8bea-48ad-9564-511912f52f27/dante_inferno_canto_xvii.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcaf.bin
86f16bbcbd10c8fa562fb9342e3ffb9ef50a68acc8d38719fb676f9ef34d5fa1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAF 5040 bytes
font_01_sfnt_off00010dcb.bin
91267bddc03d122712fa3cbaac6098bd5906960d2b5dd82c5fa13887c9d1a9d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DCB 11548 bytes
font_02_sfnt_off00013501.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13501 4324 bytes

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