Malicious PDF — malware analysis report

Static analysis result for SHA-256 17c123287fcd362a…

MALICIOUS

PDF

77.8 KB Created: 2021-02-21 19:39:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 7d224a287e3ccff2d3e850a5fe96641e SHA-1: 6d624793ae188df1f6c7ae621ff51f5b51ff634e SHA-256: 17c123287fcd362ae7b5e067cfb3ed695dc72c2850095385436b1ba810c3e045
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://maypoin.ru/wb?keyword=how%20to%20prepare%20for%20dental%20school%20interview PDF link annotation
    • https://buparemekixa.weebly.com/uploads/1/3/0/7/130739227/vijodezukaw-rileme.pdfIn PDF document text
    • https://cdn.sqhk.co/pobefozo/0gfUuZe/dasonivunedamir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463262/normal_6005c1edb2cb1.pdfIn PDF document text
    • https://tefojemitadu.weebly.com/uploads/1/3/1/6/131606809/ec26185c44b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408009/normal_6020274f635c1.pdfIn PDF document text
    • https://cdn.sqhk.co/xakalodesi/dPhXiaC/fasole.pdfIn PDF document text
    • https://jawuwokobot.weebly.com/uploads/1/3/1/3/131381435/zexofe-wegox-lezabarom-bibuben.pdfIn PDF document text
    • https://cdn.sqhk.co/devisofage/jihf6bW/bitopipetinu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479718/normal_601980d0dc2f6.pdfIn PDF document text
    • https://cdn.sqhk.co/biwizalibe/yje13hi/kogunawulegoriruxiroxomid.pdfIn PDF document text
    • https://defelewag.weebly.com/uploads/1/3/2/7/132741475/jevis-jidapi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379473/normal_5ff205a927f90.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/luborinizu/pdf_reader_arch_linux.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/ladozolif.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/pukoxidiweguz.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/consumer_reports_best_car_booster_seat.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/sijugo.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/project_aware_logo.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_off0000f439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF439 5356 bytes
SHA-256: 5cc36267b31346c6c50d53b042acb518814b38633fd7e6893b269515ff34cbc4
font_01_sfnt_off00010683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10683 10412 bytes
SHA-256: a1d11fa242bd099e1bc72b0cb5bcf510debe240ec6c833fc8c1269cbe38dd34c