Malicious PDF — malware analysis report

Static analysis result for SHA-256 b86d4d917e60ef57…

MALICIOUS

PDF

77.7 KB Created: 2021-03-10 18:48:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d7daf797f20fd621179b5591db8294ba SHA-1: 2ab2715dd19f472437b81edaa913d21a68e21eac SHA-256: b86d4d917e60ef5776fb27a38e2907b8f789cbf89c1889f0c20fa685aa9a4e3e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://botokaw.ru/strik?utm_term=death+notices+columbus+ohio PDF link annotation
    • https://tusujowifavenag.weebly.com/uploads/1/3/1/4/131453847/2838ff0b2138f3a.pdfIn PDF document text
    • https://cdn.sqhk.co/dewufidabo/j8iajhi/sports_bike_wallpapers_for_my_mobile.pdfIn PDF document text
    • http://nebemor.mywebcommunity.org/78057690875.pdfIn PDF document text
    • https://guxiwuwo.weebly.com/uploads/1/3/1/0/131070036/rogilenufaj_furiwabonafun_likepotor.pdfIn PDF document text
    • http://sevoxotedeki.medianewsonline.com/pretty_little_liars_book_4.pdfIn PDF document text
    • http://kazimibi.getenjoyment.net/66947303344.pdfIn PDF document text
    • http://kazexezawulozij.mypressonline.com/werajezib.pdfIn PDF document text
    • http://vonowaz.iblogger.org/cisco_firewall_software.pdfIn PDF document text
    • https://wabezapodila.weebly.com/uploads/1/3/1/4/131437306/7522048.pdfIn PDF document text
    • https://xudagemiribu.weebly.com/uploads/1/3/1/3/131378943/35b5e8824e2bb42.pdfIn PDF document text
    • https://cdn.sqhk.co/rumoligodo/HduBBhc/rutepuxidirapo.pdfIn PDF document text
    • https://nitomono.weebly.com/uploads/1/3/1/4/131454496/6093130d4.pdfIn PDF document text
    • https://cdn.sqhk.co/reparepoki/hicjdjg/naruto_x_boruto_ninja_voltage_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8150dd0b-4c2f-4831-819a-1e6616456efc/what_is_shear_flow_viscosity.pdfIn PDF document text
    • http://xabudavadeguvo.myartsonline.com/sikisikoga.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/how_does_the_final_outlander_book_end.pdfIn PDF document text
    • http://tomijejimener.epizy.com/free_will_template_northern_ireland.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/fekekufu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45370e73-fc60-44f0-81bc-ff665fdbe901/40740880128.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/casio_chordana_composer_app.pdfIn PDF document text
    • http://zetuvidofik.epizy.com/java_calendar_format_date_string.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ba6ea79-491f-402f-9331-31edf7ed2548/daninonavitiko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c213a9f-8e1f-41f8-997f-3c4cd83c4d98/how_to_find_molecular_orbital_configuration.pdfIn PDF document text
    • http://gibubijoluri.rf.gd/53400072334.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/70106464855.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_off0000f351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF351 5080 bytes
SHA-256: 81becf906c856d0c8c44ea93ae16f1a1bb67bb0159cb28dd67f0b2387165f383
font_01_sfnt_off00010477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10477 10820 bytes
SHA-256: d39f39e4ed22e17f0f5f1b44f0a3710c8abc254312d57cf2abe657b76c547dae

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