Malicious PDF — malware analysis report

Static analysis result for SHA-256 58dc4c862cfe12ab…

MALICIOUS

PDF

86.9 KB Created: 2021-03-15 04:04:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: b7917d4121f376fcf777d4696fe2dcc9 SHA-1: c50e424a633daf65eb4487c592a1739a1fd52c07 SHA-256: 58dc4c862cfe12ab66c242f933df3f3381bcdf0b6f6c7159dced7dc162abed4e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, identified as a link farm by heuristics. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were extracted, the structure and URL distribution suggest a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://leonvi.ru/wix?keyword=nioh+2+raven+tengu PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4422180/normal_5fdac047b34e0.pdfIn PDF document text
    • http://rowowesofazov.medianewsonline.com/14381247061.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389821/normal_5fcbb886a4578.pdfIn PDF document text
    • http://wuxixezigitezir.mygamesonline.org/autocad_2020_notes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401559/normal_5ff0b3a7455c0.pdfIn PDF document text
    • http://slimitalia.space/classroom_rules_flashcards_printable1yuy7.pdfIn PDF document text
    • http://basumoxivor.sportsontheweb.net/what_is_his_name_narration_change.pdfIn PDF document text
    • http://monubagujizud.mywebcommunity.org/9214911974.pdfIn PDF document text
    • http://melidagerukebel.sportsontheweb.net/padisikivajewakixenekero.pdfIn PDF document text
    • http://particulier-societegenerale.xyz/fefexopebikuxevuu0i.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462732/normal_5fe424b973972.pdfIn PDF document text
    • http://shop-onlinediscount.xyz/44282580723tn9bj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379054/normal_601fd79c515cb.pdfIn PDF document text
    • http://onlinetyz.xyz/one_clue_crossword_answers_chapter_39kyhoj.pdfIn PDF document text
    • http://ionatr.fun/heart_of_darkness_themesoy3zy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387241/normal_6023324c295d0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fepujevuzal.rf.gd/pokadas.pdfIn PDF document text
    • http://puxejinasor.epizy.com/du_battery_saver_app_apk.pdfIn PDF document text
    • http://zudupaxub.myartsonline.com/zekorapubigisirumatimonul.pdfIn PDF document text
    • http://pujumek.myartsonline.com/what_is_the_fundamental_code_of_jewish_civil_and_canon_law.pdfIn PDF document text
    • http://wemiwapava.epizy.com/mevexij.pdfIn PDF document text
    • http://gujimosodaza.myartsonline.com/survival_servers_ark_setup.pdfIn PDF document text
    • http://safodur.epizy.com/titogobopurikadapedikop.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000109aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109AA 3392 bytes
SHA-256: 7791ce9cbd205b96612ae89750be6d100172db6938981e0f27bc1bcdb0e2c402
font_01_sfnt_off000115d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D0 4900 bytes
SHA-256: 27da50092fa6080d22dcc69d96e46084348e1abb3cdc2b47d74d58ab012caf50
font_02_sfnt_off00012682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12682 11416 bytes
SHA-256: bc2b4be440e425bee1f973dfaf67a54a12c83702011162c9dd58ea687fae908c

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