Malicious PDF — malware analysis report

Static analysis result for SHA-256 47d1e0b6a957cdfd…

MALICIOUS

PDF

77.0 KB Created: 2021-03-18 10:08:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: d69ee404e88f0e0d891865727ef2099c SHA-1: 454e74b8aa89e71bccb8c3f964a36b43032be918 SHA-256: 47d1e0b6a957cdfdd95ddb8682d2e74ddc52d1caaf39af607d93c9eba009f0fd
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing attack designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://fokemale.ru/123?utm_term=apple+carplay+android+radio PDF link annotation
    • http://fejixisuburuza.22web.org/it_infrastructure_interview_questions_and_answers.pdfIn PDF document text
    • https://dipitamadupod.weebly.com/uploads/1/3/4/8/134882687/gimevosipapos.pdfIn PDF document text
    • http://votewimuvuxa.iblogger.org/histoire_cambodge.pdfIn PDF document text
    • https://kizozejibudi.weebly.com/uploads/1/3/4/4/134460324/9773343.pdfIn PDF document text
    • http://kapovulup.mywebcommunity.org/24213543984.pdfIn PDF document text
    • http://meroxisawifagu.mygamesonline.org/vorizov.pdfIn PDF document text
    • https://menafemudiwifog.weebly.com/uploads/1/3/0/8/130813668/6511999.pdfIn PDF document text
    • http://pekikanelobe.22web.org/airmen_y_group_syllabus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jofesosozofoso.epizy.com/77454938624.pdfIn PDF document text
    • https://1628ddcf-e301-416d-9649-d9339b85441b.filesusr.com/ugd/0b1079_adf3e3d924d84e0fa35357fec1a67f2f.pdf?index=trueIn PDF document text
    • http://gumubagigafaj.rf.gd/15676564445.pdfIn PDF document text
    • https://f59c0a4d-c104-43ac-8966-a5978cdf1b8c.filesusr.com/ugd/0c1ebd_bc8d552002854ad8bb9ebe3477cc4143.pdf?index=trueIn PDF document text
    • http://rumasujosunux.epizy.com/kuzevejanodeguxerenez.pdfIn PDF document text
    • http://begulazelukej.rf.gd/the_norton_reader_13th_edition_online.pdfIn PDF document text
    • http://salajire.onlinewebshop.net/mowipowusukifafi.pdfIn PDF document text
    • http://negubikalijewu.epizy.com/as_time_goes_by_piano_sheet.pdfIn PDF document text
    • https://b3dfd9c9-1030-471f-a26d-814ea73dbccc.filesusr.com/ugd/d97afa_d0911b2d9cea4444ae775ef9e9bba548.pdf?index=trueIn PDF document text
    • http://bosadubarelazu.rf.gd/resokuvi.pdfIn PDF document text
    • http://wawutanow.epizy.com/58752530070.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_off0000ef30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF30 4980 bytes
SHA-256: 715b5013281ae8e1c96feda18971e4ad60d4da75d839a3ce17d16cccc2025b98
font_01_sfnt_off00010039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10039 11304 bytes
SHA-256: 97d62cb53cf61513bfff4c6caf345092384257dfc1e96579587f4eeb4e82c068

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