Malicious PDF — malware analysis report

Static analysis result for SHA-256 e00186d1d0745a0c…

MALICIOUS

PDF

74.6 KB Created: 2021-03-04 03:42:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 360fb04a8cdf35baa52fc02c42b51ff7 SHA-1: 1d6619b1439644d8084c51ea127d9883f3d9d731 SHA-256: e00186d1d0745a0c14c1a784561592b6811a7d326f4082cae3f963b640822143
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 pointing to PDF files, suggesting a link farm or phishing attempt disguised as a download resource. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of malicious activity.

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/123?utm_term=ray+dalio+principles+audiobook+download
    • http://kexaxalerokoliz.iblogger.org/the_last_question_best_short_story.pdf
    • https://cdn.sqhk.co/mewivupa/igiauid/rababojenagena.pdf
    • https://cdn.sqhk.co/jivonaxadu/49bhchd/vodelifi.pdf
    • https://berarenojinoz.weebly.com/uploads/1/3/4/7/134737003/turixo-gusor-josukudurewis.pdf
    • http://wavikedinufefe.iblogger.org/interpreting_charts_and_graphs_worksheets.pdf
    • https://cdn.sqhk.co/powirafawume/ijIpyjc/14636794343.pdf
    • https://tematurulabi.weebly.com/uploads/1/3/1/6/131606540/f29c9cdc92ae56.pdf
    • https://cdn.sqhk.co/zexoribuj/hgjfjjm/ralipakibarosi.pdf
    • https://cdn.sqhk.co/rinilafexowi/BjeChdp/39501188997.pdf
    • https://mosaminaworite.weebly.com/uploads/1/3/1/6/131636744/5882343.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fudowoxalukiki.rf.gd/bursalagu._com_video.pdf
    • http://dadedejesewoji.epizy.com/quais_as_melhores_frutas_para_dieta.pdf
    • http://parubixus.rf.gd/biocatalysts_and_enzyme_technology.pdf
    • http://rojavig.epizy.com/what_is_iso_quality.pdf
    • http://runodeb.rf.gd/navugisesukifususepikejum.pdf
    • http://palojolasorut.rf.gd/99385249378.pdf
    • http://bujitajaxo.epizy.com/revenue_model_powerpoint_template.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5a8.bin
32c511f3ed59922af03d92eed614cda2042b695e8d5256312a422c6d5a9c300e
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A8 5472 bytes
font_01_sfnt_off0000f86e.bin
0a815169e3c57e9357ba2e87d64a8318b1617296c5cd02b384a4f3ffe3dc787e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF86E 10688 bytes