Malicious PDF — malware analysis report

Static analysis result for SHA-256 b416cde01f772c49…

MALICIOUS

PDF

77.8 KB Created: 2021-03-16 08:17:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 6d11cec6e4f5f67d4c05b7c1d2615b69 SHA-1: 3ffa2d12cc3864cca224321571be21aeea403da8 SHA-256: b416cde01f772c497aca57f43d5ef79c442879841cd8be70caa8fd7c9f15daa7
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://botokaw.ru/wb?keyword=is%20there%20a%20sign%20test%20to%20get%20your%20license PDF link annotation
    • http://opt15.ru/tijemujusedikemazaledaroz91zvr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422148/normal_604d9e77d3d09.pdfIn PDF document text
    • http://rabemedexisubis.mygamesonline.org/pavabu.pdfIn PDF document text
    • http://kuvitexubo.iblogger.org/the_drawing_of_the_three_illustrations.pdfIn PDF document text
    • http://sandiego-podcasts.com/7429794253569ms7.pdfIn PDF document text
    • http://reetodo.online/army_dispatch_procedures_powerpoint1q6aw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372707/normal_600bd98580521.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369917/normal_5fe7e5de244aa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456999/normal_5fed55465ef67.pdfIn PDF document text
    • http://pixxel.life/table_of_standard_normal_probabilities_for_positive_z-scores8i0te.pdfIn PDF document text
    • http://remont-kvartir-otzyvy.moscow/32404520960kgjyl.pdfIn PDF document text
    • http://easterthjg.com/manedogenabanapejikofh6mxx.pdfIn PDF document text
    • http://smartradiobf.ru/dell_latitude_e6540_screen_sizejudc6.pdfIn PDF document text
    • http://uspehdnyaaxyz.xyz/duliturdscye.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481667/normal_602552df7f6e6.pdfIn PDF document text
    • http://zujewubowufonug.scienceontheweb.net/2021373688.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bebovufuvuji.myartsonline.com/vefadu.pdfIn PDF document text
    • http://zuwitemozu.epizy.com/braving_trust.pdfIn PDF document text
    • http://wujagenak.atwebpages.com/whistleblower_ukraine_complaint.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/522e5ddb-4c9d-40b1-ba73-d55104ea7329/45763663213.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e715cde1-4d8c-4e37-b5bf-f884fc76a24a/best_choke_tubes_for_stoeger_m3500.pdfIn PDF document text
    • http://walazej.rf.gd/el_poder_curativo_de_la_cbala.pdfIn PDF document text
    • http://keporeninudo.rf.gd/lspdfr_0._4._1_callouts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42034c07-0e52-45fe-8c38-c968983e5f60/97777924347.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_off0000f4bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BD 5100 bytes
SHA-256: caa966554ee24a2c1835847d74be1ae7b4cd4ebcf23cdd8bffaf93c2e5d0cab2
font_01_sfnt_off0001061b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1061B 10588 bytes
SHA-256: 3572d6cbec6a7a1f16e365ad4c0696fa970a011866ad717a5579f00273802b15

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