Malicious PDF — malware analysis report

Static analysis result for SHA-256 60fe4a4826d57b3c…

MALICIOUS

PDF

76.9 KB Created: 2021-04-12 23:42:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: b3c5d573759af42655696beb05f111e2 SHA-1: 2058c4e334a8f83d89b81082349735ecb6f82a1d SHA-256: 60fe4a4826d57b3c5c9fbfb00f4432229fca67ed39c6b023d1c38a4f99684ed6
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 drive traffic to potentially malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs and the document's structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dugedepap.ru/strik?utm_term=how+to+pass+actuary+exam+p PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4469136/normal_60591570a9ec3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416510/normal_5fd9a25082ed4.pdfIn PDF document text
    • https://radifepibonavu.weebly.com/uploads/1/3/2/7/132712096/zumiruwi.pdfIn PDF document text
    • https://vepemetamat.weebly.com/uploads/1/3/4/3/134354227/86f81f0.pdfIn PDF document text
    • http://vonoxafaku.scienceontheweb.net/alive_pearl_jam_guitar.pdfIn PDF document text
    • http://bapatavusirave.mygamesonline.org/how_long_does_it_take_to_get_good_at_stock_trading.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485704/normal_6015fc4ea70d4.pdfIn PDF document text
    • https://bisigibibozika.weebly.com/uploads/1/3/4/4/134438783/luxegusinowetelojula.pdfIn PDF document text
    • https://resuzomesidi.weebly.com/uploads/1/3/4/7/134746605/ff1185f1980f30.pdfIn PDF document text
    • http://lejunuzegakikuv.mypressonline.com/cache_memory_tutorial.pdfIn PDF document text
    • https://cdn.sqhk.co/joxusozomilo/jaijcVN/67632761144.pdfIn PDF document text
    • https://cdn.sqhk.co/tudosiki/hgijgeO/9719098953.pdfIn PDF document text
    • https://cdn.sqhk.co/mogowepuw/Libje8Z/20936202253.pdfIn PDF document text
    • https://wetolobumusu.weebly.com/uploads/1/3/4/5/134579125/3beb77bc914a85.pdfIn PDF document text
    • https://libufuvebugun.weebly.com/uploads/1/3/1/4/131406816/maralezoterewumujal.pdfIn PDF document text
    • http://zaxiluxedexu.getenjoyment.net/plant_physiological_ecology.pdfIn PDF document text
    • https://vagapirub.weebly.com/uploads/1/3/4/6/134648019/6a258251137a75.pdfIn PDF document text
    • https://cdn.sqhk.co/sawomunuj/hdiejgE/free_mini_games_ps4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jugugesazo.myartsonline.com/5955850476.pdfIn PDF document text
    • http://sesukunijekoti.epizy.com/memento_mori.pdfIn PDF document text
    • http://zifiroduvibo.rf.gd/22700572441.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_off0000ecd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD3 5268 bytes
SHA-256: 7884a9afbaa12c2b216f56870ce45546a7255ae4c344a0dbd0142a41a50924d7
font_01_sfnt_off0000fec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC0 11616 bytes
SHA-256: 373e2c8a325a1d913f046eddf841f9914ebf1bb7e85dd9f94bd7b720a6ad2023