Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddd05b97520fcbcb…

MALICIOUS

PDF

71.5 KB Created: 2021-02-18 02:27:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 22837a967171e26a9f7bf3de9a929281 SHA-1: d6239fa2c589f307154da982772f965054a1f276 SHA-256: ddd05b97520fcbcb7799ef54d41affd1754ef819e0aabe76548005663984efc8
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/wix?keyword=gta+5+download+apk+game PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4497075/normal_5fcd95f54eefd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426545/normal_5fdda363ad2df.pdfIn PDF document text
    • http://begetus11ppz.xyz/gateway_students_book_b2_answersblft8.pdfIn PDF document text
    • http://fragcups.com/pottery_3d_mod_apkjqyrx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477910/normal_600fef9d2d862.pdfIn PDF document text
    • https://mikudone.weebly.com/uploads/1/3/4/3/134370159/raluxepos_zikozifomar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483082/normal_5fe9022b27bbe.pdfIn PDF document text
    • https://kuxadolawemigos.weebly.com/uploads/1/3/4/7/134712866/243276.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/tutasujal/47893001242.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/folic_acid_rich_foods.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/didekajovopenidonowe.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/shutterstock_video_er_online.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/self_cert_form_sickness.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/73960179552.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/91239020655.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_off0000dc27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC27 5316 bytes
SHA-256: f0cf8c4aa7ce3802407e256b0a8cfa31e272c756c512ba431f9d8b165bc96877
font_01_sfnt_off0000ee4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4E 10296 bytes
SHA-256: 32f0e859ab9c7e4812e6ff41974e9de3a4cfe0509adc01b100afe4c744fcd526