Malicious PDF — malware analysis report

Static analysis result for SHA-256 f138af43bba61be2…

MALICIOUS

PDF

72.6 KB Created: 2021-03-19 16:59:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ea119eadb70128f9d4dbe638f5b0a23a SHA-1: 58b2fd3c82d59281994b989c0db3ef586502b131 SHA-256: f138af43bba61be2798fced330529584b1c050a9160016cbd6048a1dd3e499f1
126 Risk Score

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 0.9993

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://fokemale.ru/award?keyword=medicinal+chemistry+books+yogeshwari+pdf+download PDF link annotation
    • https://cdn.sqhk.co/masezupusi/goD6if8/movie_detective_byomkesh_bakshy.pdfIn PDF document text
    • https://cdn.sqhk.co/ragejeli/mhehihe/kanovijaxowumo.pdfIn PDF document text
    • https://cdn.sqhk.co/kavatupopum/ifxhajj/santorini_greek_cuisine_deland_fl.pdfIn PDF document text
    • https://gegoviboz.weebly.com/uploads/1/3/4/8/134876631/2fa039.pdfIn PDF document text
    • http://xemuzaxu.22web.org/78295353985.pdfIn PDF document text
    • http://kigumelez.medianewsonline.com/advanced_dungeons_and_dragons_adventure_modules.pdfIn PDF document text
    • http://lurubalopare.sportsontheweb.net/cinema_4d_architecture_tutorials.pdfIn PDF document text
    • https://cdn.sqhk.co/fiporalisu/8tPGfAv/fifa_women_s_soccer_tv.pdfIn PDF document text
    • http://lifobamalelit.22web.org/dominos_garlic_parmesan_white_sauce_toppings.pdfIn PDF document text
    • https://sipedevesebin.weebly.com/uploads/1/3/4/8/134879103/detakiroriki_negixasar_basimelanaki.pdfIn PDF document text
    • https://bowonalixatan.weebly.com/uploads/1/3/5/3/135347428/4640eac042df78.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dimebokizuxak.rf.gd/53185332583.pdfIn PDF document text
    • http://sorisavitekinuj.onlinewebshop.net/resumen_de_bacterias_microbiologia.pdfIn PDF document text
    • http://motiwuk.rf.gd/control_systems_engineering_degree.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/beforuvadususizetimuz.pdfIn PDF document text
    • http://dasobiviwadodaj.atwebpages.com/ptu_b_tech_mechanical_syllabus.pdfIn PDF document text
    • https://6d4cd3b7-91e9-43ac-92b9-205473f1e50d.filesusr.com/ugd/28146e_76270222893047089bb6f94abc786659.pdf?index=trueIn PDF document text
    • https://7afd96e6-4611-46d4-9b98-d111b897c281.filesusr.com/ugd/154221_c8512125677d42828e66e90eef8ed284.pdf?index=trueIn PDF document text
    • http://mepulufe.epizy.com/emotional_intelligence_2.0_online.pdfIn PDF document text
    • https://72b50e20-f79f-40ca-96b4-24bef83e308f.filesusr.com/ugd/1a1092_8538529477614332a564559c84cf2b9e.pdf?index=trueIn PDF document text
    • https://dec4a425-646e-450a-80ca-a73a75d058ad.filesusr.com/ugd/ba3095_6aefbc40fb6c49a69d2f1c961b919c3d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bojafazes/guluwo.pdfIn PDF document text
    • https://55963656-6eb1-4b25-bcd5-bb835d65808b.filesusr.com/ugd/0064ae_54a3fe28fc6749a692c12544141befdd.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC0 5972 bytes
SHA-256: 55b8e7b5132f3a8885fc7b0ac086c823b005b797bab48686caa0d551fa5184d8
font_01_sfnt_off0000f107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF107 10464 bytes
SHA-256: e4a38522d8cc50b14712f6eb766587bfea1bfee2ed2f185a58aa73a430516cdf

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