Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cfc5f2bf92fa105…

MALICIOUS

PDF

82.6 KB Created: 2021-02-25 03:00:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 1d7a1216fa1404e862290891a9d744e6 SHA-1: b5b3a8efa75eda2a9ecb96da0f5fe151b5014501 SHA-256: 9cfc5f2bf92fa1050a427387c368b17698f43db93bf9deb287f6aa413d6f5fc5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, with high-risk heuristics indicating it functions as a link farm. The PDF contains a large number of external URLs, many hosted on disposable domains, suggesting a phishing or malware distribution attempt. The document body is heavily corrupted, preventing analysis of its specific content, but the overall structure points to a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://druttle.ru/strik?utm_term=al+quran+academy+london+bangla+pdf PDF link annotation
    • https://munowimil.weebly.com/uploads/1/3/1/4/131406650/82b2cfc.pdfIn PDF document text
    • http://xotiluzop.22web.org/9971698926.pdfIn PDF document text
    • http://betflixguvenilirmi.com/reduce_file_size_mac_free_softwareokdso.pdfIn PDF document text
    • http://takipleskazan.org/92990653329n4hq1.pdfIn PDF document text
    • https://salobomuxalevi.weebly.com/uploads/1/3/1/0/131070078/lasojum.pdfIn PDF document text
    • http://maska-respirator.shop/22468851221h4vce.pdfIn PDF document text
    • http://timujegewaverun.22web.org/sorebiwawuniwa.pdfIn PDF document text
    • http://003-center.ru/the_theatre_experience_13th_edition_redditwhsrg.pdfIn PDF document text
    • http://tikovg.xyz/collision_analysis_worksheet_answers_physics_classroom747ic.pdfIn PDF document text
    • https://rizafosukozesal.weebly.com/uploads/1/3/5/3/135346652/vogofo.pdfIn PDF document text
    • http://netezasodi.22web.org/rimamukojo.pdfIn PDF document text
    • http://carbackseat.site/10368618291qokhb.pdfIn PDF document text
    • http://robinmani.site/aer_lingus_cabin_crew_application_form4h695.pdfIn PDF document text
    • http://visionnew.xyz/rejasulomatuzapi5dchu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lozisuvuxinosog.epizy.com/72452207421.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/14691174281.pdfIn PDF document text
    • http://ruzojonawa.epizy.com/imperial_march_bass_clarinet_sheet_music.pdfIn PDF document text
    • http://fasokefukolu.epizy.com/1922739406.pdfIn PDF document text
    • http://magotabitujotu.rf.gd/wexitojatuberikisaw.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/zezidavijuxefunuf.pdfIn PDF document text
    • https://s3.amazonaws.com/kubedukowug/64281048513.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/52017628501.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.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BE 3104 bytes
SHA-256: cd4349afe2f1af5047d9e772e55779f1bf6afbcd6af77b70489873e28f2b828b
font_01_sfnt_off0000eed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED1 5656 bytes
SHA-256: c47d92c6316ff075f0f1a7d094389be9b500c0901bd06b9888754b98db3084b8
font_02_sfnt_off000101ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101FF 6248 bytes
SHA-256: 7f9285a1d2990a4c042cb9cc6d2aca4423c78fabaaeddb35ff9368483ca5866b
font_03_sfnt_off00011609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11609 10772 bytes
SHA-256: 68a8a172dacd9781f4cd91d66611ec320008e63baac6019d688a18b035d34d2a

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