Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5b5e3f8ba3d742f…

MALICIOUS

PDF

88.1 KB Created: 2021-03-14 23:29:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 8c3bfe5ae035331276dc7c2f4cb57325 SHA-1: cf0722535e7840e28288b8803ca1929165de2544 SHA-256: f5b5e3f8ba3d742f6a5aefb17aea737a9d96598207559477158d850141e69c81
184 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious URL, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, appears to reference 'Pagalworld english song remix', suggesting a lure to attract users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=pagalworld+english+song+remix In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380230/normal_603c185326c4e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482617/normal_5fc93f65b7fde.pdfIn PDF document text
    • https://bapamebitisetup.weebly.com/uploads/1/3/4/3/134325238/tutikifafejugev-wetibosafo-titivutelulozub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387430/normal_6030d00e1adf4.pdfIn PDF document text
    • http://nadipewin.mywebcommunity.org/6488405061.pdfIn PDF document text
    • https://kezeminitiwo.weebly.com/uploads/1/3/4/4/134476020/tetepazuduwe.pdfIn PDF document text
    • http://rusakadovub.sportsontheweb.net/antrenmanlarla_matematik_3_soru_zmleri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409630/normal_601ce3d70fb7f.pdfIn PDF document text
    • http://palubofapejuraw.mywebcommunity.org/xomaraxurat.pdfIn PDF document text
    • http://xuroriwonufuz.scienceontheweb.net/clasificacin_de_los_numeros_reales_ejemplos.pdfIn PDF document text
    • https://furimulu.weebly.com/uploads/1/3/1/4/131411024/ritoboleni.pdfIn PDF document text
    • https://nudopimiga.weebly.com/uploads/1/3/1/0/131070212/bafosekeriseler.pdfIn PDF document text
    • https://tilinonulubun.weebly.com/uploads/1/3/4/6/134614078/bd279ca3f525.pdfIn PDF document text
    • https://bewevirat.weebly.com/uploads/1/3/1/4/131437926/xireluriviwog-libuf.pdfIn PDF document text
    • http://ludirobus.getenjoyment.net/suvipamid.pdfIn PDF document text
    • https://derikuboxema.weebly.com/uploads/1/3/0/7/130776504/148130.pdfIn PDF document text
    • https://wepulawako.weebly.com/uploads/1/3/4/0/134096509/wavisutonefejixo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373983/normal_6036ce1885053.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/zibenoroduzuw/bevokosilakalabozavow.pdfIn PDF document text
    • http://wovibojo.onlinewebshop.net/pirajamagozugenexonaso.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/psd_flyer_templates_with_bleed.pdfIn PDF document text
    • https://s3.amazonaws.com/wizakokowe/32472535166.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/wixotakix.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000105e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E7 5400 bytes
SHA-256: 85b571285df61b776f1f7fbae13d08a1bd71a66f8776363070ee248c8e64112a
font_01_sfnt_off0001182a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1182A 11060 bytes
SHA-256: 82be9175eb56017fc5326a07aee0b41d5a5fe59410674b03d7a199144c50897d
font_02_sfnt_off00013d4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D4F 16140 bytes
SHA-256: 5bfda07072dd2e1b0df7f1680a75ba616774ec51e1a09c257f000ba239241e1c