Malicious PDF — malware analysis report

Static analysis result for SHA-256 038dcde313520b2b…

MALICIOUS

PDF

81.8 KB Created: 2021-02-20 22:52:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1e6c45f947bac49b240678cfd7b757c8 SHA-1: 38b6161a5d75c492b247e3e93b088cf32aae4ba4 SHA-256: 038dcde313520b2bfc89c7735a3905dc4752c9213a6b2b53b1bf2f32f33646d1
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically pointing to a domain associated with phishing and disguised as a movie download. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of external URIs and a link farm heuristic further supports the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://maypoin.ru/123?utm_term=how+to+train+your+dragon+2+full+movie+google+docs PDF link annotation
    • https://rororejiwep.weebly.com/uploads/1/3/5/9/135966539/8645432.pdfIn PDF document text
    • https://xisotufonadate.weebly.com/uploads/1/3/5/3/135384012/rewelizal.pdfIn PDF document text
    • https://cdn.sqhk.co/fevivesuxofo/zBUhaYo/34825761385.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370068/normal_60061d4fc7b71.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380540/normal_5feef4138d975.pdfIn PDF document text
    • http://lofitner.buzz/mangrove_rhizophora_apiculatabawn3.pdfIn PDF document text
    • https://zolowokixo.weebly.com/uploads/1/3/0/7/130738875/gakajeb.pdfIn PDF document text
    • https://cdn.sqhk.co/fewukise/jjCji5y/photo_editor_video_maker_online_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/wudawagirus/gdZygdM/spacex_capsule_landing.pdfIn PDF document text
    • https://bafonalilazuxi.weebly.com/uploads/1/3/4/7/134731076/512171e2991c614.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382423/normal_5fdab7eea9f51.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/sugowubuf/water_margin_tv_series.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/creative_powerpoint_presentation_templates_free.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/kegolosofoteg.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/lelalaregotejajajupano.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF200 5688 bytes
SHA-256: 88ae1c922999f51ac24721374d4f81cbaa7a9fe4cbb4c127fed71b9e009a016d
font_01_sfnt_off00010565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10565 2240 bytes
SHA-256: 50ca125b0d257618552ed7dbde28693f79a27622ef902a95d7f43f51e5adca70
font_02_sfnt_off00010f7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F7F 12136 bytes
SHA-256: 17890b074e8dffc3399a67cd0a3cdf33b3b591888d58e13a994e0a3235cc218b

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