Malicious PDF — malware analysis report

Static analysis result for SHA-256 de5fa8f629fe9141…

MALICIOUS

PDF

78.4 KB Created: 2021-03-11 21:09:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 5a4ff6732b028c540841dec267239ccd SHA-1: 0f63fee846528992b8fb4f3d0c0e6a219d08d37c SHA-256: de5fa8f629fe9141581cc04cfcc54dce1be2f721240f6264799ab558a84b6d58
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/aws?utm_term=what+does+civic+mean+in+italian+address PDF link annotation
    • http://gejulavofanutar.mygamesonline.org/common_interview_questions_and_answers_for_project_managers.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/gdDjgWT/tmnt_portal_power_latest_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/lutadamafe/jeSxjjg/94010705942.pdfIn PDF document text
    • http://bodipok.getenjoyment.net/mifuse.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/wazotojemov/game_center_account_on_android.pdfIn PDF document text
    • http://kawerulim.onlinewebshop.net/is_diablo_2_still_played.pdfIn PDF document text
    • https://288c7b4b-0494-48f6-8ee2-9dd519b96b0a.filesusr.com/ugd/a107db_a2c4818286a943439dafcd64ee6450af.pdf?index=trueIn PDF document text
    • https://0d555108-1732-4721-8d72-76d747b2053a.filesusr.com/ugd/1b0481_58effc471c744b4a8d237e430e0b91ee.pdf?index=trueIn PDF document text
    • https://88e92b2d-3ddf-41b2-a2ae-4af48bfba274.filesusr.com/ugd/b74686_ef3b868e2f7f4c719b663bef8a12e833.pdf?index=trueIn PDF document text
    • http://bitenozof.atwebpages.com/53300846686.pdfIn PDF document text
    • https://0ca3454e-05ac-49fc-8d00-644b1af7be3c.filesusr.com/ugd/8bf3fc_3cce28f08d50401f820d0e823146c304.pdf?index=trueIn PDF document text
    • https://b354d503-40d1-4c97-84b4-bc0b16c12f35.filesusr.com/ugd/8c7d07_ddd84bfd55d44dbbb7c766927d8e5999.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/panokojol/employee_satisfaction_project_report_mba.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/92835091159.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/a_b_c_d_song_bestwap.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_off0000f4f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F3 5252 bytes
SHA-256: 87bc373b1ff950ae209a22c7d3cd01d44f971e245112430ac7fb2ec2e0bf752b
font_01_sfnt_off000106b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B4 11360 bytes
SHA-256: eefc75b6d852efe5842017f0d8c0810a39af9e80e8fb8544bef69acc40e41533

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