Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab93e225dce1142d…

MALICIOUS

PDF

81.9 KB Created: 2021-04-06 15:51:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: bcc0fc0bdd67a4b531c8c1e18c0eef8e SHA-1: c94dfd5f418c861c4dfd9f85fa605a5636ece84a SHA-256: ab93e225dce1142d1ee32265cea64deda78e42eda7b0c7b3ce82ad4082b10893
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 ClamAV and an ML classifier, with heuristics indicating it uses an image lure to redirect users to an external URL. The primary URL identified, https://jottigo.ru/award?keyword=weight+training+for+fat+loss+female+pdf, is associated with a phishing lure. No scripts were extracted, but the PDF structure and URL suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/award?keyword=weight+training+for+fat+loss+female+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403260/normal_6010d1772a1f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459774/normal_603bbf13b6fef.pdfIn PDF document text
    • http://nibakelenixezas.getenjoyment.net/ikea_catalogue_2020_kuwait.pdfIn PDF document text
    • http://tazizinujumijoj.mywebcommunity.org/antimalarial_drugs_introduction.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410431/normal_6000272bde77d.pdfIn PDF document text
    • http://doruguduku.iblogger.org/84348405033.pdfIn PDF document text
    • http://tinipen.medianewsonline.com/kptcl_recruitment_2020_notification_kannada.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454809/normal_5ff9dc667c09a.pdfIn PDF document text
    • http://moderivapotilos.22web.org/frp_bypass_apk_qr_code.pdfIn PDF document text
    • http://girepodemaz.getenjoyment.net/ring_theory_abstract_algebra.pdfIn PDF document text
    • http://jekefidaz.mygamesonline.org/planificacin_estrategica_de_mercadotecnia.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369782/normal_5fee45166f1a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374857/normal_6067dcb026c35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389101/normal_605507b2d0ddc.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/povelenavuviw/what_do_you_study_to_be_a_real_estate_agent.pdfIn PDF document text
    • http://jezawirigi.epizy.com/bastonete_de_auer.pdfIn PDF document text
    • http://fipaduwa.epizy.com/a_single_man_movie_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/zipupipat.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/black_boy_chapter_13.pdfIn PDF document text
    • https://4cd5a77a-be8d-44ba-8952-4177873115c4.filesusr.com/ugd/930050_a4765b8944554ae58b7747d3bc6249ec.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vunizi/sipuwijokanitelof.pdfIn PDF document text
    • https://bf68d742-fb98-404a-ab47-1dcf24f7df52.filesusr.com/ugd/83e7fd_a85f681f16c949f78c8be11bdaaf3888.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fukepez/45767097198.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_off00010328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10328 5468 bytes
SHA-256: bdd56393fc2e4546c95420affbd18587e3839f80663299a3745a75c5edef64d4
font_01_sfnt_off000115ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115AD 10700 bytes
SHA-256: 4781845f140fa9011df0be4c056c18d16a6969246caf8eef341c70eac70140a9

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