Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d27acf937d885e1…

MALICIOUS

PDF

118.7 KB Created: 2021-02-20 11:16:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6fad77509b242a9676b1c63f9654920c SHA-1: bdae06113f3fe9d578405366b9bb14396a10127e SHA-256: 1d27acf937d885e1fbdf8e854282f38a2031e2c6eda6eab3709c3141229b7bc2
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, as indicated by the 'PDF_SEO_LINK_FARM' heuristic, suggesting it's designed to drive traffic to other sites. The 'ML_NYX_PDF_MALICIOUS' and 'ClamAV: Pdf.Phishing.Trojan' detections strongly indicate malicious intent. While no scripts were explicitly extracted, the nature of the link farm and the presence of external URIs suggest a phishing or malware distribution vector, likely initiated via spearphishing attachment.

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://leonvi.ru/wix?keyword=ethnic+religion+examples PDF link annotation
    • http://onlinetiser.website/english_reading_comprehension_grade_2bdpoq.pdfIn PDF document text
    • https://wugepazi.weebly.com/uploads/1/3/4/3/134348030/berutavo_nanez_riwuz.pdfIn PDF document text
    • https://verevivomilob.weebly.com/uploads/1/3/0/7/130738769/a1b41855d461622.pdfIn PDF document text
    • http://lixuzixewufixib.66ghz.com/bully_math_3_answers_xbox_360.pdfIn PDF document text
    • http://xonajagavasuj.22web.org/lazufed.pdfIn PDF document text
    • http://vebejisidag.66ghz.com/oracle_bpm_software.pdfIn PDF document text
    • https://midatapeb.weebly.com/uploads/1/3/1/0/131070166/486b875a30a788.pdfIn PDF document text
    • http://nonly.xyz/lexapro_davis_drug_guidekwckq.pdfIn PDF document text
    • https://nuvefozilif.weebly.com/uploads/1/3/4/7/134733792/raworivaralozak-vatit-jejewa-dipekig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fobifuv.epizy.com/toxoxobiluzisukavibuzupij.pdfIn PDF document text
    • https://s3.amazonaws.com/wezukep/facebook_carousel_format_size.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/free_able_cursive_handwriting_sheets.pdfIn PDF document text
    • http://zokitidekav.epizy.com/kirazusosaxijozopuzojeg.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/suara_burung_cucak_ijo_juara_internasional.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/federal_court_complaint_template_word.pdfIn PDF document text
    • http://xurorovesi.epizy.com/pulilosaf.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/no_cable_tv_guide_colorado_springs.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxegu/zeduvogawot.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_off00018033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18033 5160 bytes
SHA-256: 0b1f1a88694e39a0fd48ae3bf1309bb4cdc6a48ad6418a9cd53972ced1d32637
font_01_sfnt_off0001918a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1918A 14820 bytes
SHA-256: 5ebd8b160701e7d1f6b111d44b3b31108b61abefa824a898604dd93fb6167719
font_02_sfnt_off0001bf11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BF11 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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