Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ee76b9693b0b5bd…

MALICIOUS

PDF

83.1 KB Created: 2021-02-23 19:28:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 201b7fe17b3fb4c00292c845f55ce6d1 SHA-1: e1addf9ae90af1250d5aa69ae9452d265bf50fa0 SHA-256: 0ee76b9693b0b5bd4d0ebeafa39717bc7a12a3762b81285f021b050feae4bcb4
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://jottigo.ru/wix?keyword=promoting+child+development+and+learning+articles PDF link annotation
    • https://vevorusafe.weebly.com/uploads/1/3/4/5/134516648/2637263.pdfIn PDF document text
    • https://sazulolako.weebly.com/uploads/1/3/1/4/131453808/e947d95a23b79d2.pdfIn PDF document text
    • http://xakuneferufilew.iblogger.org/panaridabunumefozuwajer.pdfIn PDF document text
    • http://dkmz2.club/8473997754jaizd.pdfIn PDF document text
    • https://jajesawi.weebly.com/uploads/1/3/0/8/130813829/turutajowa.pdfIn PDF document text
    • http://rukozhop-guide.com/wezasipeliwikogotd818.pdfIn PDF document text
    • https://lerelapukuvi.weebly.com/uploads/1/3/0/7/130740054/menupevutuvo.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
    • https://s3.amazonaws.com/labitajaxatufib/nedugulunum.pdfIn PDF document text
    • https://s3.amazonaws.com/farokof/82957755367.pdfIn PDF document text
    • http://lixanixuzuki.rf.gd/15612691547.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/modern_able_free_resume_templates.pdfIn PDF document text
    • http://wanezezigemos.rf.gd/algorithm_complexity_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/jotujemejalorubo.pdfIn PDF document text
    • http://pawulufotes.epizy.com/ruxusekuwikagowilaxal.pdfIn PDF document text
    • https://s3.amazonaws.com/lowebemuwojiso/7242192082.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/bathukamma_songs_2018_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/crystal_reports_alternative_python.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/solitaire_collection_for_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/lexile_levels_chart_to_guided_reading.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_off0000fafc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFC 5336 bytes
SHA-256: 09164b2d0c8cc32ffbcc2a3e13162b08ee5e18b91594e59ad95cdb094490645b
font_01_sfnt_off00010cea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CEA 10452 bytes
SHA-256: 08ff65cbb1568c0524f59770793aead89243427618da5edbdbcf0c3a4676c97b
font_02_sfnt_off000130ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130BA 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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