Malicious PDF — malware analysis report

Static analysis result for SHA-256 748d954661157ac0…

MALICIOUS

PDF

84.1 KB Created: 2021-03-18 16:15:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 23290495ea4b58464571aedfa0b73500 SHA-1: 73a973644bf4611fc245a60883d95d2b8b2cfdaa SHA-256: 748d954661157ac05538858a44d87b9e01767ec8b08b6df48c76f6599ebf6284
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to suspicious domains and identified as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://lozipotod.ru/wix?keyword=niagara+fire+wire+youtube PDF link annotation
    • https://lemirupuzomive.weebly.com/uploads/1/3/2/8/132814022/b7e202.pdfIn PDF document text
    • https://cdn.sqhk.co/zaviresodew/vuxid3g/16239029013.pdfIn PDF document text
    • http://kuxakutefop.22web.org/26230835664.pdfIn PDF document text
    • https://cdn.sqhk.co/zobazulibes/khcOnjd/kakigekukurutolalakab.pdfIn PDF document text
    • https://datugabow.weebly.com/uploads/1/3/4/7/134745554/lomoreso_lugokug.pdfIn PDF document text
    • https://cdn.sqhk.co/tovipovo/OheZsjd/jimafamadofumixajutawobu.pdfIn PDF document text
    • https://cdn.sqhk.co/kawiwitifa/hh7sgez/medajesagoxufu.pdfIn PDF document text
    • https://cdn.sqhk.co/kipezipilojo/ibUjfgd/94997663580.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/5e54c962-cc11-4376-a90f-5def870a7788/32513485357.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cf5ccfa-2e42-4601-86c3-7f408e7864da/romeo_and_juliet_act_3_scene_3_stylistic_devices.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6ce2308-1b81-4567-af75-9aa6281a5391/how_to_pair_motorola_comfort75_baby_monitor.pdfIn PDF document text
    • http://tuzivapevof.epizy.com/6834974266.pdfIn PDF document text
    • http://duvipegi.epizy.com/teoria_quimiosintetica_del_origen_de_la_vida.pdfIn PDF document text
    • http://xijobepiza.epizy.com/ridexakozoniviwamipujore.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/xujupezenuwamine.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/69194266256.pdfIn PDF document text
    • https://46b09160-81f9-4cb3-9cca-f7b5b0c0229e.filesusr.com/ugd/179cc6_156944229c8b4f198b3cb5cd47439ac0.pdf?index=trueIn PDF document text
    • https://425e2ee7-996f-4c6d-a593-b44a2a39b733.filesusr.com/ugd/bb05c1_bf9bd3ec59664beb88a607d19f6f2ce7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ce8187a-7ef5-4c29-84b0-c799dc7062b8/why_ethanol_has_a_higher_boiling_point_than_dimethyl_ether.pdfIn PDF document text
    • http://xetitonaj.rf.gd/amatic_regular_font_free.pdfIn PDF document text
    • https://f1c0478e-57b3-422a-b8eb-433964b677d2.filesusr.com/ugd/16c17d_30896f536e7c48dfb672269def6471f3.pdf?index=trueIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD6 5028 bytes
SHA-256: 243125c6e31ce1e868e292c465d3a6e8029979892d5590c2310958e347acb85a
font_01_sfnt_off0000fd21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD21 2216 bytes
SHA-256: 7b7aece24d0cc7b657e9d179ab78fd72c3a167f9d5ce6e8f36e28d86f92dba03
font_02_sfnt_off0001071d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1071D 10940 bytes
SHA-256: f66fc90f0fcd9bc1d130031df05b2e8090bd6d3384c7ae35019b6dacb753fed4
font_03_sfnt_off00012cca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CCA 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e