Malicious PDF — malware analysis report

Static analysis result for SHA-256 602ac021a004db83…

MALICIOUS

PDF

84.6 KB Created: 2021-03-15 21:33:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 7c889c9b05d3f78a56113f667bbffe46 SHA-1: 605f04d45d83f7e82451a9886b0bd8421d0400f0 SHA-256: 602ac021a004db83b314aece7aa625ff35e1281447468fbeb574dd7f4239c495
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of techniques used to host malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://pelibifir.ru/strik?utm_term=do+androids+dream+of+electric+sheep+comic+pdf PDF link annotation
    • https://rinezafuwokof.weebly.com/uploads/1/3/1/4/131437641/5417759.pdfIn PDF document text
    • http://golosa-spasibo.ru/hayward_salt_cell_warranty_replacementdohzs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469641/normal_60189f5f3797b.pdfIn PDF document text
    • http://smallita.space/anggur_merah_29vay5.pdfIn PDF document text
    • http://neojust.ru/starting_my_own_clothing_line_redditi9okw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393639/normal_601704cac40e8.pdfIn PDF document text
    • https://lezekuzog.weebly.com/uploads/1/3/1/3/131378913/sijajujem.pdfIn PDF document text
    • https://motutipe.weebly.com/uploads/1/3/4/6/134674000/lelazovafufu.pdfIn PDF document text
    • https://digaporabanezaf.weebly.com/uploads/1/3/4/6/134689005/39924e9.pdfIn PDF document text
    • http://mon-fortuneo.best/anything_something_nothing_everything_exercises9dfga.pdfIn PDF document text
    • https://subutadenurafo.weebly.com/uploads/1/3/4/5/134581349/xowukatuzowamadi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414701/normal_6037f29945bff.pdfIn PDF document text
    • http://hrushch.space/6194965961zrx93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497687/normal_600d612fd64da.pdfIn PDF document text
    • https://telewebejuta.weebly.com/uploads/1/3/1/6/131607630/bikirogafebasuro.pdfIn PDF document text
    • https://fixewanum.weebly.com/uploads/1/3/5/3/135309042/8190247.pdfIn PDF document text
    • https://nodepuje.weebly.com/uploads/1/3/4/5/134518199/3428682.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/pazatuv/chemdraw_professional_17.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/bully_hack_apk_obb.pdfIn PDF document text
    • https://29ce6865-365c-47c4-9f0a-635d6f965865.filesusr.com/ugd/0d6b77_5da414ad76894706a098e1e339baa5ca.pdf?index=trueIn PDF document text
    • https://27aa3d6a-fcc1-4574-a8e0-77dd5bf64dcc.filesusr.com/ugd/7683ec_9f18ecd0996d49d4ab9d665d7879a991.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/waxevozimavuxe.pdfIn PDF document text
    • https://b3a1a1c9-4f8f-4fb8-b7cc-7339030cc889.filesusr.com/ugd/162fe6_ac6b42c768fc4f599a52875d79313b97.pdf?index=trueIn PDF document text
    • https://9d50af6f-dbf7-41ba-b854-83985329a12b.filesusr.com/ugd/33c377_951bc1eee1214f90be7b41f5b40e1a51.pdf?index=trueIn PDF document text
    • https://02664c88-84e5-42fa-aae3-682d3a0d4328.filesusr.com/ugd/39d081_7ed9c4b7b5224e568c7c35b0539eaf07.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/51017548412.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/acidosis_tubular_renal.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_off00010cd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD8 5396 bytes
SHA-256: e12a4483ffb4b9f2a0e438901066f9fee993b46117081c097d1568b186506174
font_01_sfnt_off00011f09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F09 10892 bytes
SHA-256: 23b10ecd7735962402654ba48bc63d08b9db9f73d705246fedb6e3c21d06bd02

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