Malicious PDF — malware analysis report

Static analysis result for SHA-256 19410daae8d6a382…

MALICIOUS

PDF

120.2 KB Created: 2021-05-26 07:52:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e02feaafb88f5f79c0bfc4c7af01593d SHA-1: 18d2d85057cc4ed5d1601c9538fe555015dc09f9 SHA-256: 19410daae8d6a382015b6b510a5ee3b403815149f454bab600e5d410787d9029
194 Risk Score

Malware Insights

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

This PDF document functions as a link farm, directing users to multiple external websites, including one with a 'utm_term' parameter suggesting a phishing or scam lure related to Instagram followers. The PDF contains a mass of external links, many hosted on disposable domains, indicating a malicious intent to redirect users. While no scripts were explicitly extracted, the PDF structure and the nature of the embedded links suggest it is designed to lead users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://jumiwimov.ru/strik?utm_term=real+instagram+followers+increase+app PDF link annotation
    • https://detubutil.weebly.com/uploads/1/3/5/3/135348338/nabebodisobani_korilawurigulid_dizepinid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459319/normal_602da45d4c0a0.pdfIn PDF document text
    • https://ligegumipiwefu.weebly.com/uploads/1/3/3/9/133999845/4122377.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383681/normal_5fd0f51c4a266.pdfIn PDF document text
    • https://xefujalebide.weebly.com/uploads/1/3/2/6/132681694/bevofemeg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424951/normal_5fe35c3bd57c9.pdfIn PDF document text
    • https://dozadekexojigig.weebly.com/uploads/1/3/4/0/134096874/zadilafuj_jijenuwusedak_guwiresifu_wokuxirak.pdfIn PDF document text
    • https://fogufufizanalu.weebly.com/uploads/1/3/0/8/130813948/7652750863dee1.pdfIn PDF document text
    • https://xorizelipuv.weebly.com/uploads/1/3/1/6/131637744/0d8ab9.pdfIn PDF document text
    • https://vasanawibef.weebly.com/uploads/1/3/4/6/134651618/tapowonivepilig_dedopot.pdfIn PDF document text
    • https://tovibibuxajewen.weebly.com/uploads/1/3/5/9/135968099/1ace4427762c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386597/normal_5feb783301212.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387235/normal_5fe401954bd05.pdfIn PDF document text
    • https://sazejorewisiboj.weebly.com/uploads/1/3/4/4/134459615/2335439.pdfIn PDF document text
    • https://kewejalafu.weebly.com/uploads/1/3/5/3/135329801/d6143c37812f6.pdfIn PDF document text
    • https://dasowafajego.weebly.com/uploads/1/3/4/7/134723411/luvin.pdfIn PDF document text
    • https://jefanumu.weebly.com/uploads/1/3/4/8/134889008/zebezusituxu.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/60a62644-00a0-4f94-864b-ae15cb62b1e8/disiwejubifijuwitur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e47daf5-b21d-4b6d-8ff4-81bfd461958d/indian_stock_market_today_prediction.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd5a1e73-5d3b-4de0-a67a-91e74a3b466d/69755106676.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb89e02a-6437-420d-bdcc-763661529888/computer_network_definition_gcse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0a5e92a-40ce-4cfe-9af6-cf2052ad3511/goxujumigor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd0e2d98-775b-4ec0-8376-ae1acf8886cc/17647017073.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0958f7e9-f9fb-40f1-90df-3c36a9c5590c/cobra_29_lx_service_manual.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_off00019861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19861 5436 bytes
SHA-256: c02a2202020daa29d8baa011c8c45a16648b568aa990f3b6a9a965ffc8f3208d
font_01_sfnt_off0001aae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AAE6 11752 bytes
SHA-256: 27cfa8258082c221ff09ef854dc822e15e1f8ed32b1e5a1e63d1db135d93c19b

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