Malicious PDF — malware analysis report

Static analysis result for SHA-256 9324f094c2978f53…

MALICIOUS

PDF

103.0 KB Created: 2021-03-14 17:32:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: d75649a48d58cae641fca312bc7fa4cc SHA-1: 27a36252ff0e60c6c0c3503becc6b1b335e944f6 SHA-256: 9324f094c2978f53027711999fd0dda723f8349d3d46d84c8caacf25556f12ae
134 Risk Score

Malware Insights

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

The PDF file contains a lure related to a "student exploration observing weather answer key" and embeds a URI pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site.

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://nipisod.ru/wix?keyword=student+exploration+observing+weather+answer+key PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4454045/normal_5febb354a4a36.pdfIn PDF document text
    • https://ronabamipiboti.weebly.com/uploads/1/3/4/5/134598089/bitepije_gokex_gokoj.pdfIn PDF document text
    • https://komojagalon.weebly.com/uploads/1/3/4/8/134885500/dowut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368997/normal_601b3fc6c8e95.pdfIn PDF document text
    • http://nasty666.space/bedroom_furniture_for_sale_near_me_usedwzyaz.pdfIn PDF document text
    • http://fruitik.space/3696091432i6mdk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461498/normal_5ff22fea79260.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369932/normal_5fef7c1ba320d.pdfIn PDF document text
    • http://theraisins.pro/how_to_troubleshoot_air_conditioner_not_turning_on6m5f9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486200/normal_5ff4714390b93.pdfIn PDF document text
    • http://canlisohbetim.net/masivasenixemilidetisz3mx3.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/cfc28036-90cb-4f60-8b71-66f160d01523/lactancia_materna_en_ingles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f772310-89a6-4095-bf43-7acb4c6c355c/96296778930.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e60690ea-ee0d-4fc8-848f-6784678acb2b/lg_tone_hbs-900_infinim_bluetooth_stereo_headset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9a3e03d-0039-4f9d-afe3-8c0e784079c2/44300820495.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b8767f5-df42-42d5-bb38-3019317691d5/josap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d4fbafd-afce-4dfe-84f8-aba4326d1a78/on_the_milky_road_full_movie_watch_online_free.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013d69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D69 5852 bytes
SHA-256: fcfe7ab7f116e8d3dd92ebc92eb60790fefc8c3ebcec7cf35d99e8bcab44de4e
font_01_sfnt_off0001515a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1515A 10904 bytes
SHA-256: 14d5f1a32d631bb68188077aee8628341d86cffe2739711e4269eb25f1fc0da9
font_02_sfnt_off000176d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176D1 16340 bytes
SHA-256: 8680b359cba86e2f6e9a78cf8c0f9e51b009e062d62f51157c34cd29f25a410b