Malicious PDF — malware analysis report

Static analysis result for SHA-256 00a69710aa42fee0…

MALICIOUS

PDF

80.8 KB Created: 2021-03-16 21:09:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: cc7ab17c52e6e986359c057f125ce002 SHA-1: cd3508c2b1b7abe511df774525da7e51dff45b63 SHA-256: 00a69710aa42fee0dd6d1d13c703de7372beb73c997eb52d6600cebe2b045014
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to SEO-optimized redirectors and PDF link farms, indicating a phishing or malware distribution scheme. The 'Book review the bell jar sylvia plath' text suggests a lure to entice users to click on these malicious links. ClamAV detection and ML classification further confirm its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xezojetit.ru/strik?utm_term=book+review+the+bell+jar+sylvia+plath PDF link annotation
    • http://kofodotig.sportsontheweb.net/zasalusogekusijutare.pdfIn PDF document text
    • http://supariwepexafat.mywebcommunity.org/maxodasazudasado.pdfIn PDF document text
    • http://minesaxofunawi.getenjoyment.net/yamaha_rx-v475_remote_codes.pdfIn PDF document text
    • https://cdn.sqhk.co/xamewivuvus/tghpxgf/luxury_travel_website_template.pdfIn PDF document text
    • https://cdn.sqhk.co/soredepel/ihxIgcS/xesitiginiromedime.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/rexogeguxosix/castor_informatique_suisse.pdfIn PDF document text
    • https://63b1f34b-4847-450f-8d9a-4788d10e1cf5.filesusr.com/ugd/451a43_fd6757634c944a05a8da4fbf07315546.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/jamibonorovabi.pdfIn PDF document text
    • https://67a4337f-2b79-4d04-9c1d-2578c80f4945.filesusr.com/ugd/964009_02d19249c3314f95990bf0220f9480a4.pdf?index=trueIn PDF document text
    • https://1a9cd40a-f0d6-44d4-a143-19288280ca2b.filesusr.com/ugd/7a13df_f7a1a7fca0a74cd7ae8aa6c378773472.pdf?index=trueIn PDF document text
    • https://1d942ef5-affb-47d8-8f99-70a3d187b733.filesusr.com/ugd/3283b0_aa1d4848e03449fe80c3951d4c496753.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/meludav/ganedodaruzorutabozawig.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/integers_worksheet_for_class_7_cbse.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/pezofewetilanu.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/marathi_dabalbari_bhajan_song.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/misumigewanixerinokogusuw.pdfIn PDF document text
    • https://fb7bf4c5-056f-4058-a7d1-073478569b53.filesusr.com/ugd/d90490_8732eab660d74c0e8c858250d7235b64.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bezorito/label_design_templates_png.pdfIn PDF document text
    • http://firiwigisu.atwebpages.com/quantitative_risk_management_concepts_techniques_and_tools_2020.pdfIn PDF document text
    • https://7fca5364-97a1-4441-b76e-d2c429a59218.filesusr.com/ugd/735424_7ad1c2cd11d041968753ba037d4d8fa8.pdf?index=trueIn PDF document text
    • http://zobuwijezad.onlinewebshop.net/59019085200.pdfIn PDF document text
    • https://c83cbd6e-a134-4b49-ba12-49f24c654ad9.filesusr.com/ugd/904a8b_54672c46cd784f77870b839865be084f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bagokiko/california_rental_lease_agreement_form.pdfIn PDF document text
    • https://f6e2a16f-d004-42cd-8f17-0463e090774c.filesusr.com/ugd/c70c35_04961f59d0ec4a8688e0fd074eaba84f.pdf?index=trueIn 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_off0000fcc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC0 5492 bytes
SHA-256: e4d8bf0244c3b1776169f1fdd7e371151bb35feb474f674f6c5a78fd8e426482
font_01_sfnt_off00010f84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F84 10764 bytes
SHA-256: 9bc11d484c8b698b9ea104d238015212f2c24bf5e95413384ccd0add6bee5652

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