Malicious PDF — malware analysis report

Static analysis result for SHA-256 89f30e2555559208…

MALICIOUS

PDF

74.3 KB Created: 2021-02-19 04:48:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 9c04b19d42db6396950c478825617a7a SHA-1: 45114ff4687ca398797e023447379c9caa50b4c3 SHA-256: 89f30e2555559208d5b549a1a95a6ab2f105edd6a894e596c89e0ee014d08b52
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains and Weebly subdomains, characteristic of SEO spam or phishing campaigns. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicate this. The ML classifier and ClamAV detection further support its malicious nature. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

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://maypoin.ru/strik?utm_term=how+to+find+parallel+and+perpendicular+lines+from+an+equation PDF link annotation
    • https://cdn.sqhk.co/titolegun/if3waih/sosupibuvatoputanerufow.pdfIn PDF document text
    • https://xutativapejan.weebly.com/uploads/1/3/4/5/134521393/e9653176c9.pdfIn PDF document text
    • https://burazukukoxuvi.weebly.com/uploads/1/3/4/0/134096138/turom.pdfIn PDF document text
    • https://pivatebovuwize.weebly.com/uploads/1/3/0/7/130775292/zanatumigizixudeneg.pdfIn PDF document text
    • https://suzonozumevudem.weebly.com/uploads/1/3/1/3/131379217/6530236.pdfIn PDF document text
    • https://cdn.sqhk.co/leporolino/iJ5hjFJ/wallpaper_love_heart_break.pdfIn PDF document text
    • https://cdn.sqhk.co/wofazexej/KhaxjfI/island_tribe_3_mod_apk.pdfIn PDF document text
    • http://jetaxopavajuluw.22web.org/6380029441.pdfIn PDF document text
    • https://zexaloguf.weebly.com/uploads/1/3/4/5/134576330/vuderulodakipen_moriwasagu_tapibajojinez_jininumebi.pdfIn PDF document text
    • https://tijikazi.weebly.com/uploads/1/3/4/3/134373218/c2bade.pdfIn PDF document text
    • http://fesupopimos.66ghz.com/pentest_lab_sql_injection_cheat_sheet.pdfIn PDF document text
    • https://regafuraseni.weebly.com/uploads/1/3/4/6/134663643/kusifijiris.pdfIn PDF document text
    • https://lekifusa.weebly.com/uploads/1/3/1/3/131382118/futodewis_latipatusi_dutegeliral_jurubupur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/unreliable_sources_of_health_information_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/maps_me_app_android.pdfIn PDF document text
    • http://ramawotinejog.epizy.com/flame_test_lab_analysis_questions_answers.pdfIn PDF document text
    • http://gisunomadipoxas.epizy.com/xudimozebe.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/14506004992.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/wagoniwi.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_off0000e239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE239 5480 bytes
SHA-256: f30a336895773986169debbb6f7bf69f8ebbabe7cf39ccfe1fc90959e9bb21ef
font_01_sfnt_off0000f4db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4DB 11132 bytes
SHA-256: 3ac029b0e63513928076f707ee2686f402d9bdff7526cdcb27c7ad9c072738a6

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