Malicious PDF — malware analysis report

Static analysis result for SHA-256 c207d9ba60ea3b58…

MALICIOUS

PDF

106.1 KB Created: 2021-03-17 10:46:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 71d3533df9ef4c426cf8bbb1ddd5fa0a SHA-1: 6ed36b0c0f53c18dda2acac1d6965f2ea071d892 SHA-256: c207d9ba60ea3b58b802b910e73e9da810b24a18c863e3547b23f1d652c5d171
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 by ML classifiers and ClamAV as a phishing trojan. It contains an embedded URL that redirects to a phishing lure disguised as a free English language download. The presence of PDF_SEO_UTM_REDIRECTOR_LINK heuristic indicates the lure is designed to attract users through search engines.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/strik?utm_term=learn+english+language+free+download+pdf PDF link annotation
    • https://cdn.sqhk.co/nosamese/6heiiGT/gopotiwep.pdfIn PDF document text
    • https://cdn.sqhk.co/badaxiloru/aHjcfhf/64766720253.pdfIn PDF document text
    • https://cdn.sqhk.co/dobajinorite/KOdjfhc/hd_wifi_camera_pro_app.pdfIn PDF document text
    • https://cdn.sqhk.co/nasubivapu/bSphchb/ding_dong_hide_and_seek_lyrics_roblox.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/sinadi/87244612014.pdfIn PDF document text
    • http://wowimiberosodav.epizy.com/gdpr_data_breach_policy_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/kuligomanixifudawujiva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0330bbe-1bbc-4474-9cda-75cbb80150a3/36626853677.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7041e470-96fb-4cc7-bf1a-9cd46c988905/jinaxikesow.pdfIn PDF document text
    • http://xamopalamusep.rf.gd/netada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df93b2be-985f-4a23-8879-982bd3324b39/37791842090.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8bf7446-8cf1-479f-bae0-730707351482/how_to_change_my_keurig_filter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acdd4899-d25d-4e7e-818a-13169a8f1e23/pudexeteki.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/kalevafub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf3816da-8090-4352-9b49-8c9a4f214bed/kinoleloligu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5df07284-c010-43bb-a4a2-67e5cca13ade/garmin_s62_on_course_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bcc62ec-c16c-4105-9487-22878897812c/mewijovedewejuzorodigi.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/what_are_the_interior_and_exterior_angles_of_an_18_sided_polygon.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/kadamban_full_movie_tamil_hd_free.pdfIn PDF document text
    • http://bevaritil.epizy.com/segani.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/70234157796.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/billiards_game_online_play_free.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_off00016165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16165 5336 bytes
SHA-256: b6a408d3dc6325db1f73f2b7c303d26cbc10b2768e639402ac1885146d5c82d6
font_01_sfnt_off000173a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173A0 11424 bytes
SHA-256: 2ea97d64a9c5bca08ccc3851c4cbac313a32d9a6959ca0ce11da0dee2b4d3498

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