Malicious PDF — malware analysis report

Static analysis result for SHA-256 190e19cb60cfbcbc…

MALICIOUS

PDF

77.8 KB Created: 2021-03-13 15:29:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d3ccf899a558dc10230a1fa0ca4a4c74 SHA-1: c515ed5b3ce80d57805f96f34fa07bb53ac4ea10 SHA-256: 190e19cb60cfbcbcc795c4e6afb69eabda20757e802a9168b7262f8e208eaeb3
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to software downloads, aligning with the heuristic identifying it as a link farm for potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://lozipotod.ru/wix?keyword=real+steel+download+apkpure PDF link annotation
    • https://tabejasutunuvi.weebly.com/uploads/1/3/4/2/134234833/gikibime_dulamemubuvul.pdfIn PDF document text
    • http://pawusofadezozep.22web.org/nuwovekenujamizosuno.pdfIn PDF document text
    • https://tujozidu.weebly.com/uploads/1/3/4/6/134694944/kododurafo_viwewukunefo_wanede.pdfIn PDF document text
    • https://zigizawinowola.weebly.com/uploads/1/3/4/4/134457077/5936900.pdfIn PDF document text
    • https://vogovolakufa.weebly.com/uploads/1/3/4/8/134874318/rolivig_lezaru.pdfIn PDF document text
    • https://sefoxobifi.weebly.com/uploads/1/3/6/0/136093232/xadugasolabate.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3030c9a-f60d-468d-8c8b-d13e36b96f04/recommended_investment_funds_2021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1494ab4a-622b-460a-b3a0-5989935b7be6/what_grade_level_is_the_lion_the_witch_and_the_wardrobe.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/java_7_certification_questions_and_answers.pdfIn PDF document text
    • http://lanosewidem.rf.gd/39356332998.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74b27f63-106c-4d4c-98f8-1cab113e0187/what_does_facilitator_mean_in_gta_5.pdfIn PDF document text
    • http://wozawexopad.epizy.com/how_to_teach_symbolism_to_high_school_students.pdfIn PDF document text
    • http://palalujopaxuv.epizy.com/jio_phone_call_recording_app.pdfIn PDF document text
    • http://rupufunolodul.rf.gd/58415007090.pdfIn PDF document text
    • https://983c8978-ad56-435f-a988-47358aa6040c.filesusr.com/ugd/06a663_c0d73619b46748c2a4d9e0bc19d03997.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lebaxa/consumer_reports_refrigerators_2018_issue.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dec208b-e020-4c4e-81b2-5c652ebf4177/pirojijomejorilelop.pdfIn PDF document text
    • https://s3.amazonaws.com/wowonesoribu/2681165338.pdfIn PDF document text
    • http://sobogasitizi.epizy.com/multiwii_2.4_failsafe_setup.pdfIn PDF document text
    • http://mavefigekote.rf.gd/zijeropavapanijematijudil.pdfIn PDF document text
    • http://nerigob.epizy.com/nice_guidelines_stable_coronary_artery_disease.pdfIn PDF document text
    • https://87d5e434-dc39-4d64-8681-877d64e204d5.filesusr.com/ugd/5660ac_a584c2dcc252485a853b97aae7639ab2.pdf?index=trueIn 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_off0000f254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF254 5116 bytes
SHA-256: 57694a71c8652c7b692a5e63f3ffafe55146268fc7580b7cf37c34dfc0e41d5a
font_01_sfnt_off000103e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E4 10992 bytes
SHA-256: 6bd4ccfc317038cd52ab687c5e7e5bf73aaed29dd75a76cf0f9cb688aaf31905

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