Malicious PDF — malware analysis report

Static analysis result for SHA-256 33ae2aeb387dac8c…

MALICIOUS

PDF

69.7 KB Created: 2021-02-12 20:56:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c0bb25b083b4f183527372e3f4be92bc SHA-1: 3e9b5716654b294f959854053aa25feafb59fce3 SHA-256: 33ae2aeb387dac8c10b8d7a3d55b9d5925d54172d72917f1b8786753facb0f3d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, pointing to various domains. One of the embedded URLs, 'https://jottigo.ru/wix?keyword=enchanted+cave+2+apkpure', suggests a lure related to software downloads. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

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://jottigo.ru/wix?keyword=enchanted+cave+2+apkpure PDF link annotation
    • http://reflectionss.space/1814435160348ojx.pdfIn PDF document text
    • http://chebsvet.ru/definite_and_indefinite_articles_exercises_elementarydtnvk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366050/normal_60097950e51cd.pdfIn PDF document text
    • http://1gusevshop.space/mimpi_gigi_copot_bagian_bawah_banyaknjnyf.pdfIn PDF document text
    • http://roskycnmx.com/modelo_relacional_base_datos_ejemplos_resueltoszd89j.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409623/normal_5fe32dd628fdb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415046/normal_5fcf3e47a2073.pdfIn PDF document text
    • https://xegupilu.weebly.com/uploads/1/3/2/3/132303007/3ad535582e3a892.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486060/normal_5fe06d8a4faa6.pdfIn PDF document text
    • https://galezarulunozip.weebly.com/uploads/1/3/4/8/134896955/2748445.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/supefujoxopubu/fire_fighting_breathing_apparatus.pdfIn PDF document text
    • http://takefaluzimun.rf.gd/26287664659.pdfIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/61787160484.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/nunakijesuderog.pdfIn PDF document text
    • http://gusufarafedi.epizy.com/wallpaper_photoshop_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/fortinet_fg-_300e_datasheet.pdfIn PDF document text
    • http://rabopusafat.epizy.com/5th_grade_math_minutes_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/96512446427.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/glossaire_anglais_financier.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/xuzepofagixe.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD377 5164 bytes
SHA-256: d9258dd9f189081516cc5478a38330c50d903bdd541c858c5547c77c9f833c7c
font_01_sfnt_off0000e511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE511 11352 bytes
SHA-256: 12e4ef3eaa6129217e6592d22d1d43d292a6e36b8828c29dd9df0fc15d508d3d

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