Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fa1a7bf9857fa71…

MALICIOUS

PDF

89.5 KB Created: 2021-05-27 06:22:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: eff39f7b14bb35ab5c0875da52aa09b5 SHA-1: 52163f4f5abe2eada6fc72512a8e86f94ecc0ab3 SHA-256: 2fa1a7bf9857fa7188f7f6b1866d26fa19d8177fad06f2f12db6f5afb65fddf5
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO link farms and phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as 'Pdf.Phishing.Trojan'. The embedded URLs likely lead to malicious content or further phishing attempts, aiming to trick users into believing they are downloading free music.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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 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.
  • 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://botokaw.ru/strik?utm_term=tubidy+musica+gratis+para+descargar+mp3+genteflow PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4475720/normal_600147c2b3f6a.pdfIn PDF document text
    • https://xulopoxaxuwuzoj.weebly.com/uploads/1/3/4/5/134509354/5376745.pdfIn PDF document text
    • https://defejeve.weebly.com/uploads/1/3/4/3/134386135/kakutemominuke-guxumixoridapop-javof-gixajiduxoti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481400/normal_5fd9d68230b25.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476927/normal_5fe1cde06fdd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379032/normal_5fd9c31b8cbd4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413108/normal_5fca11d511c31.pdfIn PDF document text
    • https://zelivetatop.weebly.com/uploads/1/3/0/8/130814581/burewonidabotixuneju.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480904/normal_5fcb90303abda.pdfIn PDF document text
    • https://diwopoko.weebly.com/uploads/1/3/4/5/134597367/6442702.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490365/normal_5ff255cf8d40c.pdfIn PDF document text
    • https://rubuvewoxuvima.weebly.com/uploads/1/3/4/8/134873715/7bdd6557f43323.pdfIn PDF document text
    • https://fugososanup.weebly.com/uploads/1/3/4/6/134679963/niwumokegaf-funamiva-tezagu-minilabefawedaj.pdfIn PDF document text
    • https://funovupudejo.weebly.com/uploads/1/3/4/4/134473131/fe81dbd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475852/normal_5fd10baa02ddf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367940/normal_5ff29e7e1da66.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365606/normal_6005b9c7a95c6.pdfIn PDF document text
    • https://jipujiro.weebly.com/uploads/1/3/1/0/131069764/xudobejogo.pdfIn PDF document text
    • https://nudaduxovusupin.weebly.com/uploads/1/3/4/3/134337963/11729b741121d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/2c48f11d-03fa-4885-b924-7996d322fb9b/nepudugevuxapi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ceb58dc5-572d-40fc-9318-d8bbd4099040/66190870044.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/397001fb-6891-4367-a74b-8ed820d1556f/vavelexiguxatetegegisoxu.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D1 5804 bytes
SHA-256: 32c8460abe21b808728620552b1367ca96fc1db4a90e79aa80eb5dd637cfc90f
font_01_sfnt_off0000fb80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB80 3060 bytes
SHA-256: 850cd20348fcbb3a98abb7be396ee704e84f1957f46dc25eabe1be9d25dfb7cb
font_02_sfnt_off0001089f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1089F 13176 bytes
SHA-256: 66644a43426d3c29ae38e0718cba5fa6c5626319008181b9a24a2fbffe269d20
font_03_sfnt_off00013263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13263 16148 bytes
SHA-256: 0db2e9213954b94746bcd8886fa6eb785ac961b815381a482a6e9a331e346e0d
font_04_sfnt_off0001474e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1474E 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176