Malicious PDF — malware analysis report

Static analysis result for SHA-256 f578aec9efc7b681…

MALICIOUS

PDF

69.2 KB Created: 2021-02-02 09:02:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: ece98180704eac551aa1118172150e74 SHA-1: 51801bda8148c64211835066e47fa920b8d9a63d SHA-256: f578aec9efc7b6815985cd5c573b77a20d66fb2808ad9fd1db7178963ad0b91e
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/aws?utm_term=adewale+ayuba+bubble+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4371003/normal_6007efd11df47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471234/normal_6017530f4da55.pdfIn PDF document text
    • http://paktum.pro/xilupezowanig218a.pdfIn PDF document text
    • http://naturagrush.space/fevukukedujimalabavitawubw22v.pdfIn PDF document text
    • https://zejewovelopitut.weebly.com/uploads/1/3/0/8/130813539/4617812.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzinipaz/cgfgfhi/zesaxewigurexutapi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477615/normal_5ff65ec365d02.pdfIn PDF document text
    • http://domensita.fun/mini_block_craft_game_free_download_for_pc3npwk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393901/normal_5fee69cf4ac2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369914/normal_60180b4bb303c.pdfIn PDF document text
    • http://weareanonymous.org/3_bedroom_house_plans_and_pictureslil95.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/Vghss7i/potuwazipuxow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492575/normal_5ffd37e587cb8.pdfIn PDF document text
    • https://cdn.sqhk.co/jatizaru/t3if0AE/old_songs_70_80_90_download_mp3.pdfIn PDF document text
    • https://cdn.sqhk.co/wojusipi/RjeRsP4/keganaretota.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d1d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D4 5048 bytes
SHA-256: 541f57ec283bde6f3e63e4a62da21568aaf73127c5018ab6a93b82aaa9939287
font_01_sfnt_off0000e328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE328 10792 bytes
SHA-256: fdef832666f19778a0e66bd648d889c0ecbc0eb1fc2ae7ee614636df79cf63e6