Malicious PDF — malware analysis report

Static analysis result for SHA-256 9706ca8d9ec19807…

MALICIOUS

PDF

71.2 KB Created: 2021-02-14 05:27:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9416b06cb69abab3454f723d9823fc6a SHA-1: 44d24542e6a46c547a26b675ec923dc2bd5892f5 SHA-256: 9706ca8d9ec19807840c49038fe05bdfdcedbaf674d8d61fe4213101bf8caf43
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating an external URI, which points to a suspicious domain. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains text related to 'Air cooler 24 amazon', likely a lure to entice users to click the embedded malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/123?utm_term=air+cooler+24+amazon PDF link annotation
    • http://dunigaki.22web.org/86793825012.pdfIn PDF document text
    • http://ribemiwunuv.22web.org/24591017.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370077/normal_5fe10d2f79ccc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404497/normal_6019db828dbde.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/tamovagag/spotify_apk_apkmirror.pdfIn PDF document text
    • http://kuwoguki.epizy.com/surviving_sepsis_guidelines_2012.pdfIn PDF document text
    • http://titarugusarab.epizy.com/foxamexegerefeginusumita.pdfIn PDF document text
    • http://bozalusi.epizy.com/30928347579.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/gikatok.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/jedaruritilugegafiwav.pdfIn PDF document text
    • http://datavofunuta.epizy.com/bullet_background_paper_template_air_force.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/18492186686.pdfIn PDF document text
    • http://lufafutogixafu.rf.gd/vijedogaro.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/xotedosokupalunekejibeba.pdfIn PDF document text
    • http://xajetizefo.rf.gd/iphone_photos_to_pc_using_icloud.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_off0000dd82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD82 5028 bytes
SHA-256: 5a00e974a10b4610e45256ba329d2c7b7ff4b74aac662fca101fbe00480ac0e5
font_01_sfnt_off0000ee93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE93 9740 bytes
SHA-256: f74df709d913d693eca59ee33ac0c7904d1c0c96a0513434a89f5ef3de65f6bd

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