Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee05b1cd7d43b97a…

MALICIOUS

PDF

80.1 KB Created: 2021-02-20 23:56:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 365dae01ee2a996e3fbf486ef101b94b SHA-1: 98675e1708f52e9dafdba62aec06f69fff9ab7a1 SHA-256: ee05b1cd7d43b97a5ef06a0806d3a5532c6497757b18bc2a88c1d65768e22635
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, a common tactic for phishing or SEO manipulation. The heuristic 'PDF_SEO_LINK_FARM' specifically indicates a large number of generated links, suggesting an attempt to drive traffic to malicious sites. The embedded URL 'https://baarspo.ru/strik?utm_term=hey+google+what+does+esoteric+mean' further supports this, masquerading as a search query to entice clicks. While no scripts were explicitly extracted, the PDF structure and link farm indicate a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://baarspo.ru/strik?utm_term=hey+google+what+does+esoteric+mean PDF link annotation
    • http://natur-bio.space/pupukopeditex8r55l.pdfIn PDF document text
    • https://sakafafemowuva.weebly.com/uploads/1/3/4/6/134694971/26455ba4585b3c1.pdfIn PDF document text
    • https://gesofomudejow.weebly.com/uploads/1/3/4/3/134344239/8697523.pdfIn PDF document text
    • https://namulore.weebly.com/uploads/1/3/4/0/134017746/4dbd0.pdfIn PDF document text
    • https://dibevapanowodi.weebly.com/uploads/1/3/0/7/130776811/tiregojalazij_wiwufotet_solumeb_dofodamag.pdfIn PDF document text
    • https://tevumusavobe.weebly.com/uploads/1/3/4/1/134108657/kapupukobevudoj.pdfIn PDF document text
    • https://wilowukodol.weebly.com/uploads/1/3/4/8/134881933/838439.pdfIn PDF document text
    • https://xibigulekin.weebly.com/uploads/1/3/0/9/130968960/55562b4e36d727.pdfIn PDF document text
    • https://juxipibofo.weebly.com/uploads/1/3/5/9/135985723/179844.pdfIn PDF document text
    • https://mokazolupi.weebly.com/uploads/1/3/1/4/131453520/fusepa_nemotuwotutoti_duzipo_mevidulo.pdfIn PDF document text
    • http://getsol.xyz/61728702843m5fus.pdfIn PDF document text
    • http://meetporte.xyz/corrugated_roof_sheeting_for_sale_durban08emt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rowigos.rf.gd/64047343368.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/adblock_android_apps.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/walgreens_humidifier_ultrasonic_technology.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/cdp_india_climate_change_report_2017.pdfIn PDF document text
    • http://mujozitovisiwud.rf.gd/shell_scripting_interview_questions_for_experienced.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/8923440249.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_off0000f952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF952 5508 bytes
SHA-256: 49f3eb4b34c9c26596b3853c4268d57a1c399ab25a62ea1d8d7755a00c066fa0
font_01_sfnt_off00010bfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BFA 11264 bytes
SHA-256: 0986c10c3ffe2eaacef727da9ec31dc5928541e7e43b07118b79ab9ea2346072

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