Malicious PDF — malware analysis report

Static analysis result for SHA-256 b26aa17aa220c525…

MALICIOUS

PDF

67.3 KB Created: 2021-03-25 11:52:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 17a691ace9a1d12691a477cb0ab2c6d1 SHA-1: 804acc36969007f6a417b0a2323b937cc187f125 SHA-256: b26aa17aa220c525f98c16542d9edb14eba1ba19a3261884a049874f2e95de09
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous external links, including one to 'leonvi.ru', suggesting it is part of a link farm or SEO spam operation. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it is designed to redirect users to external, potentially malicious, websites.

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=warlords+epic+conflict PDF link annotation
    • https://balolemarivapi.weebly.com/uploads/1/3/5/3/135309218/kidesog.pdfIn PDF document text
    • https://mejekuveko.weebly.com/uploads/1/3/5/3/135392268/ruboruvovamifugod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403938/normal_5fe1054e68697.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458838/normal_6045d6c98c75b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368466/normal_5fe6550de0086.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/guwutivupudutu/icom_2300h_programming_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/sibafozudigu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42bf5988-24c7-47c4-937e-4dd84071279c/tufoxaborebekadede.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/national_kidney_foundation_dietary_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/86575014596.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/88574659076.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/528f9b57-a0d0-4068-ba9a-0c80230bb684/what_are_some_starbucks_drinks_without_coffee.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/mackerel_run_subtitle_indonesia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7715ca68-7adb-4087-b26a-249232deb343/pogexanerekafanekazewabum.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/new_american_cuisine_cookbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f382c197-ed8d-4605-991a-7f323782b13f/how_to_pair_honeywell_wireless_doorbell.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/information_technology_sound_card.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efb4fc3c-449f-4f4a-834f-afbd4929dabf/mipubekufubukakulosa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6799666c-913d-4270-99c1-b90777f0a1ce/73896978347.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/ruripodedorakitikuduz.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_off0000cb7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB7B 5164 bytes
SHA-256: 6e9498e29659f97d5600b33be670b05dc6eecb169a8ebd343d65784248d6257c
font_01_sfnt_off0000dd27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD27 10080 bytes
SHA-256: 3f163fa4e2cf06b6d74323307ab7f6fbf4592b59518f6242c9a88715f38c7413

Open this report in the interactive analyzer, or submit your own file for analysis.