Malicious PDF — malware analysis report

Static analysis result for SHA-256 fca00a2bd9309342…

MALICIOUS

PDF

107.3 KB Created: 2021-02-26 03:41:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 000a38e8510c39c718818afe8bed07ee SHA-1: fde29f571a621a6b92b22f673bb413d3f42dcd13 SHA-256: fca00a2bd9309342f3d98444e9619c3b763259ea53fbe2fd47638621521f2c62
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to S3 buckets and other domains, suggesting a link farm or SEO poisoning tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to potentially harmful content.

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 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://leonvi.ru/wix?keyword=the+hindu+trinity+in+hindi PDF link annotation
    • http://fakixigulidol.mywebcommunity.org/59410702399.pdfIn PDF document text
    • https://luluroruzole.weebly.com/uploads/1/3/0/9/130969682/a84a6c4.pdfIn PDF document text
    • https://wugepugozufov.weebly.com/uploads/1/3/4/7/134744675/4216434.pdfIn PDF document text
    • https://cdn.sqhk.co/fatepotax/ploghqi/gta_v_survival_zombie_mod_2020.pdfIn PDF document text
    • https://rawamujorutemet.weebly.com/uploads/1/3/4/3/134360263/2884053.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/penefelomiju/furamopuzu.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/20608519547.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/98405123373.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/jekewukexanowovuvaben.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/alight_motion_pro_apk_without_watermark.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/tokitopajine.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/sasopopozulaf.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/how_many_questions_are_on_the_texas_cdl_permit_test.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/lab_report_sample_electrical_engineering.pdfIn PDF document text
    • https://s3.amazonaws.com/dagasopones/xfinity_wifi_app_android.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_off00016de4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DE4 4544 bytes
SHA-256: ad777a4f3dcf1902c378b4bc2754cd6275ead8edfd78a8d3a8686630193002f5
font_01_sfnt_off00017d54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D54 10164 bytes
SHA-256: d23a76a6dde24fac15713f251ec43fc96d52884da06387b67657d0340245ef76

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