Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6fb5c8280d06adb…

MALICIOUS

PDF

74.8 KB Created: 2021-01-28 06:37:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: af31d46d5be33fd0c40149f1b56dd59c SHA-1: 9234eeac9876a706dee6e9f5cd03163dddc7c282 SHA-256: f6fb5c8280d06adb00259b0facb4b05bda391f6d58cd6ee6319cf63c3a2dcb53
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'baarspo.ru' suggests a phishing or credential harvesting attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure, likely attempting to trick the user into downloading a further malicious payload disguised as a PDF document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/aws?utm_term=atul+gawande+books+pdf PDF link annotation
    • http://wowonofejubudib.iblogger.org/auto_battery_fitment_guide.pdfIn PDF document text
    • https://wixofixun.weebly.com/uploads/1/3/1/3/131379115/numam-xiwopivisevo-metafuno-ziturapuk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379363/normal_5fc79a226ae1a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452385/normal_60088ebe5a780.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370088/normal_600ecb0a85288.pdfIn PDF document text
    • https://lozusometuzasop.weebly.com/uploads/1/3/4/7/134741376/safuvaj_vukiwigi_fivodoso_nawegodefu.pdfIn PDF document text
    • http://santand-es.com/xobesiwanolemegosamadinagfbxod.pdfIn PDF document text
    • https://sikezenubotimer.weebly.com/uploads/1/3/0/7/130739875/gowitiweneximad-funigofa.pdfIn PDF document text
    • http://mrt-64.ru/letozad4ia9o.pdfIn PDF document text
    • http://pabubojuboju.iblogger.org/cartoon_shiva_video_song.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413980/normal_5fdd3ff848e9e.pdfIn PDF document text
    • https://ruxabetuju.weebly.com/uploads/1/3/2/7/132740595/fafatalugowivut.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446377/normal_5fe26797e3b85.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/difigomisosak/75532015141.pdfIn PDF document text
    • http://tosakiviga.rf.gd/sql_server_2014_editions_datasheet.pdfIn PDF document text
    • http://bomepexajusopa.epizy.com/zanogaximawilonenimap.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_off0000e5ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5AE 5400 bytes
SHA-256: 6e2f161796eb4bf0dc75d81ae989f1ce6709c87879159893e2915d893bc6541f
font_01_sfnt_off0000f833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF833 11128 bytes
SHA-256: a5948dd7169772d5e82737a9fd291ec2a5e2b0991f739fa59b8dfa261e44084e

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