Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e82eb4e439a9c7f…

MALICIOUS

PDF

80.7 KB Created: 2021-03-28 14:18:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 53cb27c0ae9446840953623af135cacd SHA-1: 80a9006779f08ac2f3f080e945832c1b511c7ba9 SHA-256: 7e82eb4e439a9c7f8a741e7b45ddcf35888d32beba3e23faa7bf3df8ff580bc8
184 Risk Score

Malware Insights

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

The sample is a PDF document flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to business plans and application details, suggesting a lure. The numerous embedded URLs point to a link farm strategy, likely designed to distribute further malicious content or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/award?keyword=egg+production+business+plan+sample+pdf In PDF document text
    • http://repochka.site/is_christian_healthcare_ministries_legitimateb6m3l.pdfIn PDF document text
    • http://mufobej.iblogger.org/the_opposite_of_loneliness_essays_and_stories_by_marina_keegan.pdfIn PDF document text
    • http://znalomstvavip.site/waking_dreaming_being_thompsonx618q.pdfIn PDF document text
    • http://pugumatinudozid.iblogger.org/divokovazidoruwifibojadus.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407302/normal_60025229760c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498842/normal_6010a95b45a38.pdfIn PDF document text
    • http://hookup666.site/xufipugosogufilewoziwhxct.pdfIn PDF document text
    • http://nonretloli.site/how_to_use_corningware_browning_dishp6ihv.pdfIn PDF document text
    • http://italylife.pro/422798524202i4jq.pdfIn PDF document text
    • http://matroskin.space/duvev5c5ri.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/244aec96-1c7e-4fc7-9d0b-f7c79817e3f1/successful_coaching_4th_edition_free_download.pdfIn PDF document text
    • http://vajezozaxapom.rf.gd/zeluvuxewopapobapetos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57722a61-92a7-45b3-9b66-451499b138e6/veruninutad.pdfIn PDF document text
    • http://zevofelajasuz.epizy.com/83805540607.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38a7bfb1-1e5f-4542-b2f3-9820bcfd35cc/garelelunafabobumeko.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/how_to_study_chinese_phrases.pdfIn PDF document text
    • http://kurorasi.rf.gd/fractional_indices_questions_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/simple_brochure_template_ai.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/watchguard_tdr_deployment_guide.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_off0000fe4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4B 5572 bytes
SHA-256: 563a93745ae594b062f690372039295169094b6a69592fa4ac9f85a6b71f063e
font_01_sfnt_off0001112c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1112C 10540 bytes
SHA-256: f76b3eb979a8d279d4f32eb62878ed72445794f6d506b035439ccf3638f9359c

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