Malicious PDF — malware analysis report

Static analysis result for SHA-256 026e5f9ba3232bd1…

MALICIOUS

PDF

97.9 KB Created: 2021-03-14 18:49:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2b72f19db19c0ba8084cab0a41c52e5e SHA-1: 5b0de7d855bf628288d23812e9bafc1234b4d65e SHA-256: 026e5f9ba3232bd155a9ae6269e6c8b7545ed4d0e6a4d087a38488ec1db66d62
206 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URLs that likely lead to phishing sites or further malware downloads. The heuristic 'SE_CALLBACK_LURE' suggests a potential callback phishing or tech-support scam pretext, aiming to trick users into interacting with malicious links or content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • 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.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=jvvnl+junior+accountant+notes+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4466154/normal_6044c9f91a6e4.pdfIn PDF document text
    • https://cdn.sqhk.co/togodawexu/5jcR2gi/nijoriwukesak.pdfIn PDF document text
    • https://cdn.sqhk.co/duzoxibuf/6ggcyjh/30144538694.pdfIn PDF document text
    • https://xetupowo.weebly.com/uploads/1/3/1/3/131382232/3ed8fb6cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414164/normal_602cfd3bcb4e4.pdfIn PDF document text
    • https://cdn.sqhk.co/wagomito/SfvgiA5/uae_exchange_news_2020.pdfIn PDF document text
    • http://subbellassecret.com/cradle_to_cradle_certified_product_supplier_banned_chemical_declarationyaq64.pdfIn PDF document text
    • https://cdn.sqhk.co/letijefa/hijf0hi/latigo_definicion_en_ingles.pdfIn PDF document text
    • http://luminar4-download.xyz/exercices_adjectifs_possessifsoc23m.pdfIn PDF document text
    • https://cdn.sqhk.co/xokebuzizo/dDjdggb/11302422218.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369933/normal_601233be6325d.pdfIn PDF document text
    • http://lp-consalt.ru/continuum_mechanics_and_thermodynamics_scimagovjwc1.pdfIn PDF document text
    • https://dudunetexuzo.weebly.com/uploads/1/3/1/3/131379759/nasipax_tepumawid_zasarizoni_najaxupifarowan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451941/normal_6035755cc1e8a.pdfIn PDF document text
    • https://vidujari.weebly.com/uploads/1/3/4/8/134858315/gafab_bisiboriwi.pdfIn PDF document text
    • https://bigorofepomibed.weebly.com/uploads/1/3/4/4/134400252/gatowutaxibili-zuvuziruro.pdfIn PDF document text
    • https://cdn.sqhk.co/turomixo/hhcaYjj/formula_one_racing_tv_schedule_2019.pdfIn PDF document text
    • http://discovljzg.fun/bissell_powerforce_powerbrush_2089_partsrhcpd.pdfIn PDF document text
    • https://zafitageleg.weebly.com/uploads/1/3/4/4/134489703/7477383.pdfIn PDF document text
    • https://tewafegode.weebly.com/uploads/1/3/5/3/135350941/036d168e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390329/normal_600b72afa144d.pdfIn PDF document text
    • https://pokumowudo.weebly.com/uploads/1/3/0/7/130740164/woxir-tivejotunitik.pdfIn PDF document text
    • http://lishop.site/wevaxozafoyzkgr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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
    • 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_off0000f6f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F9 5276 bytes
SHA-256: b52be3572acbf8cb41f3265e60d3f02f15b0a88c15a49fc3d30e14f7def42caa
font_01_sfnt_off00010903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10903 3720 bytes
SHA-256: b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b
font_02_sfnt_off00011466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11466 10812 bytes
SHA-256: 3c220e226e0b0f23967b71e55f96050e07580f6e7f856edfa78394326c889ef2
font_03_sfnt_off00013972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13972 16244 bytes
SHA-256: 43950c8eb7d601477c47657a547e55d3b1ac9eab981479459f718b503325609a
font_04_sfnt_off00014f1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F1E 14020 bytes
SHA-256: 46f7a5af3744296dc7eae1770c95376f9424e7ced0c525a4acaff5e7fa5d9e41