Malicious PDF — malware analysis report

Static analysis result for SHA-256 5db9aec53ff29cf0…

MALICIOUS

PDF

76.9 KB Created: 2021-03-10 03:29:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 8541459c114085d47c54e7de56abd1e1 SHA-1: bb6c6d78706a9eb10dd687342d4a00607aa757ce SHA-256: 5db9aec53ff29cf0db6b61796dc2938a7714bdea0396a6605b3c4a68cf3bf32f
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing lure, specifically using an image to redirect users to a malicious URL. The ML classifier and ClamAV detection strongly support its malicious nature. The embedded URL leads to a site disguised as cleaning instructions for a coffee maker, which is a common social engineering tactic to trick users into visiting a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dugedepap.ru/strik?utm_term=gevalia+coffee+maker+cleaning+instructions PDF link annotation
    • https://cdn.sqhk.co/nasubivapu/uWMaidW/places_that_have_money_claw_machines_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/zapakolozu/VMnQhjG/89249416342.pdfIn PDF document text
    • http://daludaja.getenjoyment.net/cdma_workshop_2.7_full_download.pdfIn PDF document text
    • http://zaranes.getenjoyment.net/jutevojitirusadozekuleda.pdfIn PDF document text
    • http://gepanukotex.getenjoyment.net/best_math_workbook_for_5th_grade.pdfIn PDF document text
    • https://cdn.sqhk.co/lunapolakezo/d95iinH/loopy_replacement_loops.pdfIn PDF document text
    • http://setopin.mypressonline.com/96865720835.pdfIn PDF document text
    • http://wugumonisukanib.sportsontheweb.net/62909189112.pdfIn PDF document text
    • https://cdn.sqhk.co/fujotojaxob/YmNhi3h/candy_crush_angry_birds_fruit_ninja.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vafitinupisojud.onlinewebshop.net/biology_textbook_grade_10.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/xasuvalawa.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/77354989376.pdfIn PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/bowmaster_mod_apk_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/9587929539.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bea9f984-df8a-4b82-847f-06df4ea4ce05/a_smarter_way_to_learn_html__css_learn_it_faster._remember_it_longer_download.pdfIn PDF document text
    • http://rogofideb.onlinewebshop.net/what_are_the_five_potential_strategies_for_conflict_resolution_in_teams_recommended_by_maginn.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/mulavonijanupo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/691faf04-264d-47e4-8fe3-35cbf52d60c5/nomelaxidinur.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/how_to_calculate_the_potential_difference_between_two_plates.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/amazon_prime_video_gratis_apk.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF79 5356 bytes
SHA-256: 75fa88dc21f0de1fbd328e94e4a17f7aa91d2d01d511001718601265e0c0a2e2
font_01_sfnt_off000101ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101AD 10844 bytes
SHA-256: bc656f20706878cefc75888706ec263fe37624803d91c9fcf98cab893516d0a9

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