Malicious PDF — malware analysis report

Static analysis result for SHA-256 25b5921b85d85ea6…

MALICIOUS

PDF

71.2 KB Created: 2021-02-25 04:10:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 2c1c84d23914d0eb43ea2b7b6ba022a8 SHA-1: 4b8270023053e11e874ede5f311d02b1b341b822 SHA-256: 25b5921b85d85ea636a3037fe352f9dbd91558b62fb6290760c7290b577c96eb
196 Risk Score

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.
  • 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.
  • 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://jottigo.ru/wix?keyword=drastic+apk+free+download+old+version PDF link annotation
    • http://jivusibofonefud.mygamesonline.org/niwumesi.pdfIn PDF document text
    • http://kutatit.getenjoyment.net/dbx_driverack_480_price.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393631/normal_6001f033ab149.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379474/normal_5ffea4cc5ca60.pdfIn PDF document text
    • http://mufutekuson.getenjoyment.net/zejaki.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402740/normal_60062917ae896.pdfIn PDF document text
    • https://fofagova.weebly.com/uploads/1/3/4/3/134313529/c67a7b94f8b5a.pdfIn PDF document text
    • http://jalazekesofijot.medianewsonline.com/how_to_use_logitech_k520_keyboard.pdfIn PDF document text
    • http://zizodoroluxonaf.sportsontheweb.net/xivap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380393/normal_600c0a529c23c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365563/normal_6009a14f5d84b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451754/normal_5ff693b68c758.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jezobasit/bohemian_rhapsody_chords_piano.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/appvn_ios_5._1._1.pdfIn PDF document text
    • http://zupitatip.atwebpages.com/latipusifexikatudubi.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_off0000cdf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDF0 5364 bytes
SHA-256: be684d3a55e2225530283cfbd8f3895cf2557f4f6bbabba4b6cea20e0f2cbe65
font_01_sfnt_off0000e062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE062 14784 bytes
SHA-256: 3d212b1070d6adb78c45d66b8831356f3ee488689d935cddf5065742581c8962