Malicious PDF — malware analysis report

Static analysis result for SHA-256 1323d0d09f2fffd8…

MALICIOUS

PDF

100.1 KB Created: 2021-02-28 01:02:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 004622bb7deaa510b9c16daced04a538 SHA-1: ca13b63da8c18c7f212779874a57636ee75bac5f SHA-256: 1323d0d09f2fffd8e57a6ad22042ee8a5967bc4e3525135e4d5e0089d4bfdc1f
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDFs, suggesting a link farm designed to attract traffic or distribute further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://botokaw.ru/wb?keyword=donnie%20darko%20philosophy%20of%20time%20travel%20pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481406/normal_5fd37870928d5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446030/normal_5fe19723898bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461211/normal_5ffc23ee4da4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466666/normal_6012324e4f657.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409246/normal_5fcf1ec40087e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390996/normal_5ff22c9828c08.pdfIn PDF document text
    • http://youtube-subscribes.com/watch_captain_america_the_first_avene16wv.pdfIn PDF document text
    • https://mefirotevi.weebly.com/uploads/1/3/5/3/135314773/wibuzafebew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422638/normal_6023017b35b44.pdfIn PDF document text
    • http://lozhobelir.space/tom_clancys_jack_ryan_season_1_episode_4_castu48no.pdfIn PDF document text
    • http://setofexperience.site/medicaid_doctors_in_standish_michigan3q1zn.pdfIn PDF document text
    • https://faniruwesil.weebly.com/uploads/1/3/5/9/135993686/fe8ad75d0.pdfIn PDF document text
    • http://nefritthebestthing.site/mithun_chakraborty_moviegpluk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450504/normal_5fce1eae15937.pdfIn PDF document text
    • https://tuledekubixa.weebly.com/uploads/1/3/4/7/134722649/5bd509d.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/suxiweke/apollo_tyres_annual_report_2016-_17.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/10066826732.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/chief_information_officer_salary_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/lagu_queen_bohemian_rhapsody_lyrics.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_off000133a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133A7 5508 bytes
SHA-256: 282320d15ed5fbb1d292752a10213630e15d9c2e5210e518011a2c7d7b030c7c
font_01_sfnt_off0001464e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1464E 11592 bytes
SHA-256: 246e558f69c23787b8f05b0d86ddc14f1521034a40272415ebf3d15e5d581eaf
font_02_sfnt_off00016e1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E1D 16028 bytes
SHA-256: ced8b21f0c91c47eb2a8e10a251844195ecd6fd413d2ce9a64032c85f057f195

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