Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cd5d2a299e4f460…

MALICIOUS

PDF

82.6 KB Created: 2021-03-15 01:58:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 631bea4ea90974dd3d01a20f4ee7f0f9 SHA-1: 53e58371ae2124895a5dee150e384df92b318a18 SHA-256: 5cd5d2a299e4f4601959e6440aee414890f8b3f48a2a8ae3dbeb03eed96b9c2d
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous external URIs, with one notable example being a link farm on disposable hosting, suggesting an attempt to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xajibur.ru/award?keyword=academic+reading+pdf+ielts PDF link annotation
    • http://dokelamalide.iblogger.org/28626175729.pdfIn PDF document text
    • http://huseyincanx.com/business_analytics_university_of_southern_californiafjryy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456165/normal_5fe70ad7003a0.pdfIn PDF document text
    • http://sendgrid-de.com/612050602616pkrw.pdfIn PDF document text
    • http://uscreditreport2021.info/how_to_program_philips_respironics_system_oneyyflo.pdfIn PDF document text
    • http://winclean-shop.space/66898460750na20l.pdfIn PDF document text
    • http://roman-holidays.shop/python_range_reverse_loop7zir2.pdfIn PDF document text
    • https://gojudewusidaza.weebly.com/uploads/1/3/4/8/134888042/4498523.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488139/normal_5fc8bc4865cdc.pdfIn PDF document text
    • https://zikowetaxubof.weebly.com/uploads/1/3/4/0/134012945/ca377d75a8332b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4528260/normal_5fdef258a241b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473064/normal_602249a182261.pdfIn PDF document text
    • https://japewilipo.weebly.com/uploads/1/3/4/4/134471591/lusome_xajagemu_zinodevaber_xodemokivopafab.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
    • http://sowituzujove.rf.gd/39150076417.pdfIn PDF document text
    • https://e97408dc-4b05-4e3b-9f19-f4127feb49ef.filesusr.com/ugd/a42eed_5f7f806d7f624ca58805c824403fdc57.pdf?index=trueIn PDF document text
    • http://josewovegufi.rf.gd/c3_differentiation_worksheet_d.pdfIn PDF document text
    • https://3064a0a7-8496-4b95-be1e-56094aee372f.filesusr.com/ugd/0cf4b9_1114272a131c4422b08831b36115ef93.pdf?index=trueIn PDF document text
    • https://679cd94f-bb1f-411a-9684-d99498fe93d6.filesusr.com/ugd/ce16d4_4945d422d60646c28dbc01414c9d5d31.pdf?index=trueIn PDF document text
    • http://ramamezez.rf.gd/95283565490.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D7 5140 bytes
SHA-256: bdfcf2561d008388789d1f6dd88bb34f81cb9d60c30b9cfacbcac87995f53423
font_01_sfnt_off00010a2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A2F 10996 bytes
SHA-256: bd0ed64b863d6ec56811a0a4b640f2ecd66d17fdcfbb5bacc879502969ad9978
font_02_sfnt_off00012f6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F6E 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

Open this report in the interactive analyzer, or submit your own file for analysis.