Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbfad99bf1dbaecd…

MALICIOUS

PDF

63.7 KB Created: 2021-01-21 09:49:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 879e913c8d254bd30196d5f44721a49a SHA-1: ab465d72118c24987af1e1771e48bd95ba907f61 SHA-256: fbfad99bf1dbaecd7cfe3e3dbdfa442912f2675f572bbeb0c22379562ea49afa
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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://baarspo.ru/aws?utm_term=arris+model+tg862g+ct+manual PDF link annotation
    • https://karoxenerom.weebly.com/uploads/1/3/0/7/130739074/zokuwamup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368266/normal_5f9bf2ba3ca4b.pdfIn PDF document text
    • https://site-1174654.mozfiles.com/files/1174654/pixel_zombie_war_survival_shooter.pdfIn PDF document text
    • https://vugogirofezufus.weebly.com/uploads/1/3/4/3/134355312/lubop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369179/normal_5f8e5e3d846de.pdfIn PDF document text
    • https://lofemeraj.weebly.com/uploads/1/3/2/8/132814933/lowusunexo.pdfIn PDF document text
    • https://site-1175068.mozfiles.com/files/1175068/bufadazititadexufowonigef.pdfIn PDF document text
    • https://wijuluberaselak.weebly.com/uploads/1/3/4/0/134016921/goxunakikimilulurex.pdfIn PDF document text
    • https://lexilovomab.weebly.com/uploads/1/3/1/4/131452944/jitepazududufu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448100/normal_5ff9f8cf42be8.pdfIn PDF document text
    • https://waduwira.weebly.com/uploads/1/3/0/9/130969623/povazifuzejine_xiduverideb_nujeto.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/nefunupu/78977368981.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/25598781022.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/53857486806.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/bendy_fan_game.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_off0000bc8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC8B 5728 bytes
SHA-256: 3def34641f97e4ed6694e9b3aac6c118385c9395c65d53f630b0809f066da74f
font_01_sfnt_off0000cff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF3 9968 bytes
SHA-256: e62d4c76c765f68cf55e1ffbfb5f02f4e37ecb8fa2c9e86116b399de420cd20d