Malicious PDF — malware analysis report

Static analysis result for SHA-256 26da8187a402f8ea…

MALICIOUS

PDF

103.8 KB Created: 2021-02-26 08:17:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b9faf5b7eddc0724b255a2e26ebb3f7c SHA-1: 025f9aba1b3e5a8b62bbc1cb087a8ea3302e7aee SHA-256: 26da8187a402f8ea7332d428559aee2b050675ae6fe4aba2dbb252805ff2f64d
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 of which are dynamically generated and point to potentially malicious content, as indicated by the PDF_SEO_LINK_FARM heuristic and ClamAV detection. The embedded URL and the document body suggest a lure related to an award or report, aiming to trick users into clicking these links. No scripts were extracted, but the overall structure and heuristics strongly suggest a phishing or malware distribution attempt.

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://bologen.ru/award?keyword=how+to+play+the+bean+game PDF link annotation
    • https://letateworu.weebly.com/uploads/1/3/4/3/134365764/kamanebun_ribul.pdfIn PDF document text
    • https://gesegalug.weebly.com/uploads/1/3/3/9/133999779/zebuf_wepodipurixuli_sirikisuz_zamonopadituf.pdfIn PDF document text
    • https://lipojiwogim.weebly.com/uploads/1/3/0/7/130776075/widepamofet_rasona.pdfIn PDF document text
    • https://relujebaxarun.weebly.com/uploads/1/3/1/1/131164257/c6600632d72f0.pdfIn PDF document text
    • https://tokoposejod.weebly.com/uploads/1/3/1/3/131380771/fasaluximaxofupuwe.pdfIn PDF document text
    • https://wokuzavewa.weebly.com/uploads/1/3/5/3/135339714/kakebixov.pdfIn PDF document text
    • https://pawonojureva.weebly.com/uploads/1/3/4/5/134522231/8d07e15c.pdfIn PDF document text
    • https://dawipufa.weebly.com/uploads/1/3/3/9/133986453/rivazujiw-buwubizubefurig-wupexasibab-manininufev.pdfIn PDF document text
    • https://lukafitujukeme.weebly.com/uploads/1/3/3/9/133997152/nukavibe.pdfIn PDF document text
    • https://mesopivupezuna.weebly.com/uploads/1/3/5/3/135311967/d12539f5090.pdfIn PDF document text
    • https://cdn.sqhk.co/galemojubemo/jeOighi/92932238284.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/jozetej/commonwealth_edison_power_outage_report.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/habitual_buying_behavior.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/picmonkey_collage_maker_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jigezilor/rational_expression_worksheet_8_answer_key.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_off00015b9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B9A 5252 bytes
SHA-256: dfad405dc956c4098a57990c7663dd13c7dd2ff96a08b1ca074802b6d6e72090
font_01_sfnt_off00016d70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D70 10704 bytes
SHA-256: b86f10d8b68575e987d15ba95875518ea8c7691f9fef290e315fe4e6ea05485a

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