Malicious PDF — malware analysis report

Static analysis result for SHA-256 084aaeb51fe2cc09…

MALICIOUS

PDF

71.6 KB Created: 2021-03-24 07:31:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: e7a8c6853107aab3e79322e30a6cadef SHA-1: 2b1c32acc53396e87383d2774253b913682f3107 SHA-256: 084aaeb51fe2cc0956fcdd5754dbb938f0b9d9a78b2ec69cb87146a34447efe3
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URL that redirects to a site offering a 'free download', a common lure for phishing or malware distribution. The document body, though heavily obfuscated, appears to be related to financial mathematics, likely a pretext for the malicious download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=matematicas+financieras+alberto+alvarez+arango+pdf+gratis PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470209/normal_6043613fe7b58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499023/normal_5fe623f766c49.pdfIn PDF document text
    • https://cdn.sqhk.co/tawibonikigo/jcXEgcs/91960904820.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387577/normal_604f11f5e9925.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481170/normal_602a175fd1711.pdfIn PDF document text
    • https://cdn.sqhk.co/fusozuwalas/igVjd9v/tiny_planets_dvd_trailer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486346/normal_5fefef2365932.pdfIn PDF document text
    • https://cdn.sqhk.co/lowixadoges/PhbIAif/28787154138.pdfIn PDF document text
    • https://cdn.sqhk.co/dudumadopole/hfJLhcg/free_movie_apk_for_android_tv_box.pdfIn PDF document text
    • https://cdn.sqhk.co/zowolanazew/iicvJje/89850722239.pdfIn PDF document text
    • https://cdn.sqhk.co/gidufulelav/egejgji/nesigotivudanevuzepi.pdfIn PDF document text
    • https://cdn.sqhk.co/nadetajagupe/cijtgjt/9372074348.pdfIn PDF document text
    • https://cdn.sqhk.co/subilikiwi/jMhfiid/online_casino_slots_real_money_usa.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/mamibis/nadimadojigugebu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c82b6d5-4a9a-411b-a650-a2aa98c9f967/presonus_audiobox_96_compatibility.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/delhi_disawar_2019_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6091c26-097c-4fb6-ad9c-cdcbc7d36dd9/how_to_adjust_access_master_garage_door_opener.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/62923081162.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bed9084-ef1a-41a7-b80b-50b122423063/92511715757.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_off0000d5eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5EB 5728 bytes
SHA-256: f5a302ba4501961afd21024070d65a6897578add5eba5ce2a836bb3b0b90796f
font_01_sfnt_off0000e970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE970 11408 bytes
SHA-256: b949546b76ba1749dad1ec1eff9f963c3b55ce9eb4a77f17246ab70b333f2aab

Open this report in the interactive analyzer, or submit your own file for analysis.