Malicious PDF — malware analysis report

Static analysis result for SHA-256 d770a352ade17675…

MALICIOUS

PDF

74.0 KB Created: 2021-02-26 00:45:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 6e28542a3afd7a30ddc40783721df71d SHA-1: 428fd330e5a045dd8eb9f8c156a73239fbd8573c SHA-256: d770a352ade17675a89005fcebc6e05e9aae9d9ae28d357424eeb070d272dfe5
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO poisoning and phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent. The presence of embedded URLs, specifically the one pointing to 'maypoin.ru', suggests the document is designed to redirect users to potentially harmful sites, likely for further exploitation or credential harvesting.

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://maypoin.ru/wix?keyword=blank+2020+calendar+pdf PDF link annotation
    • http://zegererevez.medianewsonline.com/hobart_ironman_230_mig_welder_tractor_supply.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465024/normal_602a1845625b4.pdfIn PDF document text
    • http://xijulefabogi.getenjoyment.net/murray_6.5_hp_lawn_mower_spark_plug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489251/normal_601fd6de25a67.pdfIn PDF document text
    • http://jasazotinalol.mygamesonline.org/78049707720.pdfIn PDF document text
    • https://cdn.sqhk.co/letinumi/jdhgQ52/ironmaster_adjustable_dumbbells_used.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426425/normal_5fdea71655a2b.pdfIn PDF document text
    • https://cdn.sqhk.co/sozodumupof/iiEZhi7/microsoft_teams_app_crashing_iphone_2020.pdfIn PDF document text
    • http://gekodejevotug.medianewsonline.com/isentropic_efficiency_of_turbine_represents.pdfIn PDF document text
    • https://zugavalomiseba.weebly.com/uploads/1/3/6/0/136082075/pudulove-vudun-sudugamano.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/kisimujuk/catalina_os_dmg.pdfIn PDF document text
    • https://s3.amazonaws.com/zafibimutadoti/quick_n_easy_web_builder_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/42018214397.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/hfliche_absage_angebot_formulieren.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/bafuj.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_off0000e5cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5CC 5360 bytes
SHA-256: ec6411f5acad1e789c568b6e1020e18bf4ff4e3e4887daaa866a92c95391e36f
font_01_sfnt_off0000f81d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81D 10332 bytes
SHA-256: 7cc387260d24d1e79fe28b46c55955d7d4219359db2562e8d573707eeac4db4b

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