Malicious PDF — malware analysis report

Static analysis result for SHA-256 529a68c01bc46c7a…

MALICIOUS

PDF

85.7 KB Created: 2021-02-01 18:47:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: df47bedfdf92844bdf53420a768b2a7c SHA-1: a433489a97508f408127ba90bad3f6308b2aab67 SHA-256: 529a68c01bc46c7a11b297d481710c6415e118d1a679bb384d8517d39475d070
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, specifically designed to lure users into clicking on what appears to be a product review. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the presence of malicious redirectors and the document's structure point to a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=hp+pavilion+15-au018wm+review In PDF document text
    • http://sayseedokg.com/persona_5_auto_recoveru6tlg.pdfIn PDF document text
    • https://cdn.sqhk.co/xanodujijefu/giQYsjj/clubhouse_invite_only.pdfIn PDF document text
    • http://world-wildshop.com/ethical_issues_in_online_journalismbj500.pdfIn PDF document text
    • http://expressday.online/virtual_lab_dna_and_genes_worksheet_answersmvh3u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478664/normal_5fe81fb16941f.pdfIn PDF document text
    • https://cdn.sqhk.co/tigadikem/ItheiiM/30534156042.pdfIn PDF document text
    • http://winoraama.website/design_of_steel_structures_by_duggal_freew18ui.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423145/normal_5ff79a6692a97.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/Tijicif/merge_dragons_challenge_22_3rd_win.pdfIn PDF document text
    • https://cdn.sqhk.co/temirikuji/hctYibi/dufol.pdfIn PDF document text
    • http://meetchat.space/bonunuxoparuxaxo9vj9v.pdfIn PDF document text
    • http://verifybadgesbusiness.com/logistica_internacional_libro_pierre_david_gratis22sl6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zarelusipofox/spectra_manual_breast_pump_review.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/vaponiv.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/youversion_bible_app_offline_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/nopug.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/91480943752.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/super_smash_bros_lifelight_piano_sheet_music.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 7

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10486 5248 bytes
SHA-256: 2e47b64ef3b6bf4f36111b3320079bc7a1abda9ce9727ecefcfce1d81ec06ba0
font_01_sfnt_off00011650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11650 10936 bytes
SHA-256: 40c293d7a82c30cf0fba2008b668b17543e6835ab8a7db06a471554866161984
font_02_sfnt_off00013b4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B4B 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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