Malicious PDF — malware analysis report

Static analysis result for SHA-256 aecb0ff524e938f4…

MALICIOUS

PDF

69.7 KB Created: 2021-02-11 18:54:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a0fda2c5ca568623f0e40ad9fb41651b SHA-1: ecf29ea376dfaee622e6f98a0841ec62c68fce21 SHA-256: aecb0ff524e938f49de3623895d20bdd0d5044cdaaecc09a7fc8b970251f8f8f
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jacksth.ru/wix?keyword=shoreline+math+olympiad PDF link annotation
    • https://cdn.sqhk.co/werutojij/Kojgdia/zed_lollipop_chainsaw.pdfIn PDF document text
    • https://cdn.sqhk.co/bekutojeke/Fshngjd/anonymous_mask_on_face_camera_photo_editor.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwozavenu/sEjgEAv/78285601017.pdfIn PDF document text
    • https://popupobapovuzus.weebly.com/uploads/1/3/4/0/134012290/f85402f916.pdfIn PDF document text
    • https://cdn.sqhk.co/lewikokezina/jdx8okV/best_zombie_movies_on_netflix_2020.pdfIn PDF document text
    • https://nerapusu.weebly.com/uploads/1/3/1/4/131438180/2409128.pdfIn PDF document text
    • https://cdn.sqhk.co/verexoleki/jhdjh62/95622956019.pdfIn PDF document text
    • https://sikiwakasizo.weebly.com/uploads/1/3/5/3/135318116/56f071dad4a9a1.pdfIn PDF document text
    • https://ruxibudowivuk.weebly.com/uploads/1/3/4/7/134728491/jebaduk_jekurosig_zufapaxuje_nudoxutixa.pdfIn PDF document text
    • http://zagavuxowipoj.22web.org/total_warhammer_2_malekith_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/batovafakupo/OhesBgh/dezobapedasog.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/juzowilipi/android_browser_intent_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/baal_veer_video_hdvidz.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/juxinovatiganajexol.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/42635539204.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/adverbial_phrase_exercises.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_off0000d4bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4BC 5228 bytes
SHA-256: 21c0c216f425092c9580f929e663f23cc5f408413281c2b199f756177ef59c23
font_01_sfnt_off0000e65a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65A 10520 bytes
SHA-256: 77da3424c8bb01ec56862693caddd9dea95546ee6ff449adda99ea12a5e9e496

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