Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ff4f4a4a0a13362…

MALICIOUS

PDF

80.2 KB Created: 2021-03-14 20:40:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b3c6240e428c09a85a707e06d83db5d0 SHA-1: c7776300821a020c647b224a2088e0091ae49d3a SHA-256: 4ff4f4a4a0a13362cf94ab59061b4b9ebdfe24a27c1da178e95ab56ed195d4f4
144 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a lure related to 'Lego saturn 5 launch tower instructions' and redirects to a suspicious URL, indicating a phishing or malware distribution attempt. ClamAV detection and ML classification strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a typical phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jumiwimov.ru/wix?keyword=lego+saturn+5+launch+tower+instructions PDF link annotation
    • http://kanaxade.mygamesonline.org/65239417402.pdfIn PDF document text
    • http://meetsol.xyz/bumper_io_apkibpcw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387825/normal_5feb0309c6d12.pdfIn PDF document text
    • http://verifedform.com/surah_maryam_mp3_download_with_urdu_translation_fullnirlo.pdfIn PDF document text
    • http://supsun-aero.com/17415885533rup1h.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453902/normal_601b2894ac57b.pdfIn PDF document text
    • http://believes.space/deutscher_schauspieler_das_wunder_von_bernrbda8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375521/normal_602b74b297f96.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417669/normal_5fcbe599981e2.pdfIn PDF document text
    • http://davebamonuzove.medianewsonline.com/27145765461.pdfIn PDF document text
    • http://nopotaz.medianewsonline.com/how_much_does_samsung_s9_plus_cost.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kutoxinupuroxo.onlinewebshop.net/software_qa_engineer_jobs_remote.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/why_is_my_airpods_mic_not_working_on_zoom.pdfIn PDF document text
    • https://70848fb0-0fd0-490a-9360-2ffa38fc212c.filesusr.com/ugd/08e331_c585c7326d14428c9226c0b70d7b49bc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/werojenebekawugisitazeku.pdfIn PDF document text
    • https://8271b8e8-1520-4b18-8785-2fafc8cd33e6.filesusr.com/ugd/efc97f_55dc3ddc07b149a7bd0e1bc48fe5421a.pdf?index=trueIn PDF document text
    • https://3e1d1bad-f645-4ebd-ac75-469e7ff7c972.filesusr.com/ugd/e745be_2052f2fe1bf64a46a83352d60fcf9cdc.pdf?index=trueIn PDF document text
    • https://50037ee0-0691-4a53-bdc2-b2f8f795cfa6.filesusr.com/ugd/b41a9a_7298364d949a4753b865425997a06205.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lebejos/49413241268.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/97739320159.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/31262302106.pdfIn PDF document text
    • https://c0b8f06b-4e98-4d3d-89ef-2f08caba629a.filesusr.com/ugd/0c8cc8_6f50c33beed1417fac782d58ac0bd34b.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000faed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAED 5216 bytes
SHA-256: 04e46aa4e69271991ac224247c1b9acfbbae8109732801c4305e0c9b53c109ae
font_01_sfnt_off00010cc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC4 11620 bytes
SHA-256: 4c693f7062fc70d3accdc603db8c5fd9ad4178aa8e2deccc27d73f86890ddb61

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