Malicious PDF — malware analysis report

Static analysis result for SHA-256 3de5f72011cb2525…

MALICIOUS

PDF

80.9 KB Created: 2021-04-03 16:46:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: c391a61ca3b0cddad490e81051bee8bf SHA-1: dc9a0ca274257c5ae3ef5d20391797a94b2103c5 SHA-256: 3de5f72011cb252557f0ab02ebe17e58186637180a12d39499b0dfcfd60bcd19
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous external URIs, many on disposable hosting, suggests a link farm designed to redirect users to malicious sites. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and URI findings point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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/award?keyword=noughts+and+crosses+prologue+pdf PDF link annotation
    • http://puwexakibo.iblogger.org/barbatos_6th_form_1_100.pdfIn PDF document text
    • http://pamuvelap.22web.org/43104833000.pdfIn PDF document text
    • http://xokodiraki.22web.org/bandura_1997.pdfIn PDF document text
    • http://okrasote.info/factoring_worksheet_algebraw5g09.pdfIn PDF document text
    • http://jazibagituge.iblogger.org/radigitusisofeji.pdfIn PDF document text
    • http://meblik.su/17754080923k4rt3.pdfIn PDF document text
    • http://dololebajug.scienceontheweb.net/13662287081.pdfIn PDF document text
    • http://meetsoda.club/little_chief_smoker_reviewsxd4ch.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://abbf68a8-5b21-4996-91be-11266bd273ed.filesusr.com/ugd/9374a7_db08429a168449bf901206ba71d48bb0.pdf?index=trueIn PDF document text
    • https://b354d503-40d1-4c97-84b4-bc0b16c12f35.filesusr.com/ugd/8c7d07_2fcc810d551b4f34beea09f4215c28f5.pdf?index=trueIn PDF document text
    • http://wutejaxevewef.myartsonline.com/raxapawukuma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08ec07cc-387d-406e-9269-01e2efac8f75/list_of_ernest_hemingway_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4af6867-347d-4a93-8fe2-42f81d23de25/82703243980.pdfIn PDF document text
    • https://8316a071-1c81-4729-bbc9-bb84f51c1359.filesusr.com/ugd/b2ba6b_beda24529a1d426da62c732bc25379a1.pdf?index=trueIn PDF document text
    • http://fakulolipokate.epizy.com/humatrope_dosing_guide.pdfIn PDF document text
    • https://13006a6e-9b3f-4191-9e3f-064114488741.filesusr.com/ugd/34464a_ed570bc0901a46b1b9acb7a915c6415d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e9a1578-63e6-4195-840b-5f7b6cd6d338/gaporitezedoliledijok.pdfIn PDF document text
    • http://tudaxagobex.rf.gd/how_to_write_self_appraisal_for_teachers.pdfIn PDF document text
    • https://1058d175-53f8-4d86-9201-ae9c1fc74009.filesusr.com/ugd/62a633_354872ba196c4f0e81af5aae6e599236.pdf?index=trueIn PDF document text
    • http://tokeparab.epizy.com/wotiruxavudosalizugezakif.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://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC87 5388 bytes
SHA-256: ea6e47445a904d443ad4f730940266dbf7f4f6d1eb8833cc9687ed3d5c1f04a5
font_01_sfnt_off0000fed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED6 6124 bytes
SHA-256: 406d9c14f76b4e0c27267bc63fa971fc1ebe99cb7b762b0c35436d2afb2f8dd6
font_02_sfnt_off00010ebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EBF 11964 bytes
SHA-256: 0ee8a363510a5af15fba7fd60cea6917582c0227847552c953160b7c8a5a4a80

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