Malicious PDF — malware analysis report

Static analysis result for SHA-256 f62a9a7715490171…

MALICIOUS

PDF

81.8 KB Created: 2021-04-06 22:10:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 805b4503ae890941c1f2107575dbd6ed SHA-1: 783195ef97910c6d9e1f8e914c71df4f3d442dca SHA-256: f62a9a7715490171b25224e6add44ed166a21278fa957ca4d8ac1ab0af3ad67f
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The document body, though partially corrupted, contains text related to 'free industrial automation PDF courses', which is likely a lure to encourage clicks on the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://gimoguvi.ru/award?keyword=cours+d+automatisme+industriel+pdf+gratuit PDF link annotation
    • https://xagegebalelil.weebly.com/uploads/1/3/4/5/134579129/fc6077.pdfIn PDF document text
    • https://dunopupusegujuz.weebly.com/uploads/1/3/4/3/134348927/nipumowos_fenivudu_joxuveko.pdfIn PDF document text
    • https://totuseki.weebly.com/uploads/1/3/5/3/135322554/1809520.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416327/normal_5ff1fc409e9e2.pdfIn PDF document text
    • http://zitosuganenat.medianewsonline.com/latest_makkar_ielts_speaking_2020.pdfIn PDF document text
    • http://kirakexig.mypressonline.com/papugifekexuxad.pdfIn PDF document text
    • https://gaxurorilapuw.weebly.com/uploads/1/3/2/3/132302857/2078729.pdfIn PDF document text
    • https://rixedevo.weebly.com/uploads/1/3/5/3/135306589/266685.pdfIn PDF document text
    • https://tufamivobanode.weebly.com/uploads/1/3/0/8/130814219/sogunapojejekes_kazakepezidadur.pdfIn PDF document text
    • https://jeduwenerapowi.weebly.com/uploads/1/3/4/6/134678879/6268731.pdfIn PDF document text
    • https://zitozujenuzudip.weebly.com/uploads/1/3/4/0/134042901/8b493bd1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486983/normal_60077a4e02f0c.pdfIn PDF document text
    • https://dufeduvu.weebly.com/uploads/1/3/4/4/134481569/bixugorirejixig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gapoxuvopa.onlinewebshop.net/apocalypse_world_espaol.pdfIn PDF document text
    • http://telifujovemevo.atwebpages.com/mituwogexoxegukuze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e528a89-6134-4d2c-bd83-c19c221f9ba4/how_do_smart_scales_measure_bone_mass.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b768d554-faf6-46a2-b2d8-94fd6fcaef07/descargar_los_ros_de_color_prpura_2_latino_mega.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/195607d1-3556-46f2-937e-0375ed8d7d8d/vigamelifebodewe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73cbe155-c1ff-4248-8f26-48dfe897de6f/warhammer_end_times_-_vermintide_2.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_off0000fd5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5D 5268 bytes
SHA-256: 08d892a4aa0fac7e29772eecd4b65744b513f199f6b4b0ac9ae0d169b3887218
font_01_sfnt_off00010f30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F30 13096 bytes
SHA-256: 264e3d5bdd826eecfe4e9f270cdaf876990e7b901a30f6c2d037b17ee0a03bc6

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