Malicious PDF — malware analysis report

Static analysis result for SHA-256 da216e5df787c6b5…

MALICIOUS

PDF

72.7 KB Created: 2021-03-20 22:52:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2de716e10b9d65cb75649292cada6571 SHA-1: b76704fc877ca89b282799feb6e538c54ed07308 SHA-256: da216e5df787c6b5ca1b373768573e5d729e18c68c33f5f2196352587b871938
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains heuristics indicating it is a phishing lure, using an image to redirect users to an SEO redirector. The primary malicious URL identified is https://xajibur.ru/strik?utm_term=the+way+to+love+anthony+de+mello+epub. While no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

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://xajibur.ru/strik?utm_term=the+way+to+love+anthony+de+mello+epub PDF link annotation
    • https://cdn.sqhk.co/simikitivo/Bvibu5d/faderewomorusanakifuto.pdfIn PDF document text
    • https://cdn.sqhk.co/benanejufa/gihdBUw/pokemon_heartgold_extreme_speed_dratini.pdfIn PDF document text
    • https://cdn.sqhk.co/ripalufix/djjwBhi/world_war_2_naval_history_books.pdfIn PDF document text
    • http://nukels.xyz/fodaguwudovepuvaxokutifm991.pdfIn PDF document text
    • http://crysety.xyz/short_story_lengthst2ay.pdfIn PDF document text
    • https://cdn.sqhk.co/ratufewebu/gjiexhi/water_parks_open_in_san_antonio_texas.pdfIn PDF document text
    • http://italywow.info/the_critical_thinking_company_answers19q73.pdfIn PDF document text
    • http://show-visitor.xyz/cherrypickers_guide_201780r29.pdfIn PDF document text
    • https://cdn.sqhk.co/pugepavofu/icggzje/hoover_carpet_cleaner_walmart_canada.pdfIn PDF document text
    • https://cdn.sqhk.co/tibapopedeka/j0NINbW/lurakilomipoxite.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/lezerawe/bunty_aur_babli_film_video.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/36239823757.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/615f898e-5261-472d-b232-a2f82f06f7ae/how_to_use_a_pick_lock_gun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c21c11a-9ef5-46a6-bea3-c8525f9ba699/sakaguzasonarilorawavaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcc926fd-3165-46f7-aef0-316f307d4474/64157761198.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/97696502829.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69b0a884-d69a-4620-8f87-c94fdf368fa9/vujub.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_off0000dfa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA5 5268 bytes
SHA-256: 62370fcb9f7681b6a1ac5652f7a777ee2354468cb037f808d84f25866213de81
font_01_sfnt_off0000f184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF184 10664 bytes
SHA-256: 3100448e128f00cbb3e249b0e6e330f64164a3e65b8db7e810a053d5d939be03

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