Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f6c1bc02017b10d…

MALICIOUS

PDF

80.9 KB Created: 2021-05-01 15:43:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 711e01553e61af948b17cf2fb4387407 SHA-1: ee20596e6241763aa0d2bfc3f2e03e50b3774e6a SHA-256: 9f6c1bc02017b10d7ec2a0825e6235df3877e78ee792b544827afd14fe3e4b0f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting services, and is flagged as a link farm. The primary URL, 'https://resalured.ru/strik?utm_term=how+does+ai+machine+learning+work', suggests a lure to a potentially malicious site. While no scripts were explicitly extracted, the PDF structure and extensive URL usage are indicative of phishing or malware distribution, aligning with the 'Pdf.Phishing.Trojan' detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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://resalured.ru/strik?utm_term=how+does+ai+machine+learning+work PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408701/normal_603e40438e94c.pdfIn PDF document text
    • https://sefewazugep.weebly.com/uploads/1/3/5/2/135293251/gokumu-repopalu-lixoxiwuk.pdfIn PDF document text
    • https://cdn.sqhk.co/duwewofowus/TF6jcha/dalosomukomofe.pdfIn PDF document text
    • https://febamepu.weebly.com/uploads/1/3/1/0/131070604/tuputirurari-gekokewawofolo-xizudu.pdfIn PDF document text
    • http://zijozarub.mygamesonline.org/lista_de_barbituricos.pdfIn PDF document text
    • https://pawagidi.weebly.com/uploads/1/3/1/1/131164052/jodawire_sefoladavulo.pdfIn PDF document text
    • http://tolebexeju.22web.org/network_security_fundamentals_book.pdfIn PDF document text
    • https://pizovepe.weebly.com/uploads/1/3/5/3/135323062/b879b344e41b2f.pdfIn PDF document text
    • https://kevititexozasen.weebly.com/uploads/1/3/2/7/132712545/kufobiwenusufi.pdfIn PDF document text
    • http://pixujuxe.mypressonline.com/32767873368.pdfIn PDF document text
    • https://cdn.sqhk.co/livatunozasu/yn8Uia6/nusewesesovitoloxaxa.pdfIn PDF document text
    • http://vozobatenaw.mywebcommunity.org/engineering_drawing_symbols_representation.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469359/normal_5feb4342dc760.pdfIn PDF document text
    • http://mavafesumej.medianewsonline.com/top-o-matic_cigarette_rolling_machine_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/rosomugimo/ZKifyif/gexawozul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370307/normal_6027acbcdb370.pdfIn PDF document text
    • http://gapilojazixo.getenjoyment.net/ridgid_3000_psi_pressure_washer_subaru_parts.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490250/normal_6062750de0bdd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tasolemasolaka.epizy.com/indeks_pembangunan_manusia.pdfIn PDF document text
    • http://kefujamulewim.epizy.com/what_language_does_fanuc_use.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/pentair_intellichlor_flow_switch_bypass.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/youth_shawn_mendes_song_free.pdfIn PDF document text
    • http://zajepatexesa.epizy.com/70539945542.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC31 5468 bytes
SHA-256: a0b99a7e8a7d50215cec563e60ca1fbfa54a24de34b051495fb6445fe269865f
font_01_sfnt_off00010ead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAD 11100 bytes
SHA-256: e95ea8b7349703e7e517136482230cbff2a4388216a403eb4ef2e81a7269beea

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