Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fcbc84334158929…

MALICIOUS

PDF

70.3 KB Created: 2021-03-03 14:52:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 48164501fe35d15de13b898bce6e9b2f SHA-1: 067e0522ba42323587a802fda1148790d8508ef8 SHA-256: 1fcbc843341589294197d1f9eef5b1a54726595b391d39e9d3c0753d987270e8
256 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://welabelodaset.weebly.com/uploads/1/3/5/3/135399274/jelilajenuxok-dagujajonoroxor.pdf.
  • 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://leonvi.ru/award?keyword=ddp+yoga+app+roku PDF link annotation
    • https://welabelodaset.weebly.com/uploads/1/3/5/3/135399274/jelilajenuxok-dagujajonoroxor.pdfIn PDF document text
    • https://jotozured.weebly.com/uploads/1/3/4/5/134588142/8116e010d2b19.pdfIn PDF document text
    • https://zefemebok.weebly.com/uploads/1/3/0/7/130775969/e156f0fac4dfa3.pdfIn PDF document text
    • https://xusofudubivo.weebly.com/uploads/1/3/0/7/130775679/lajupowurexuzojovema.pdfIn PDF document text
    • http://roxelejabojafe.scienceontheweb.net/subaru_ea190v_pressure_washer_operating_manual.pdfIn PDF document text
    • http://zopokujejisolan.getenjoyment.net/10544734744.pdfIn PDF document text
    • http://lozhobelir.space/how_to_lock_schlage_deadbolt_from_outsideoa866.pdfIn PDF document text
    • https://kojurivaxudofug.weebly.com/uploads/1/3/2/8/132815346/menopak.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/pisik/litufutolofekopibigex.pdfIn PDF document text
    • https://s3.amazonaws.com/wizomoravazub/33148936160.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/a-_x-_l_2018_movie_free.pdfIn PDF document text
    • http://soripewanadu.rf.gd/discovery_sport_spec_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/bounce_tales_nokia_mod_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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d86d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD86D 5080 bytes
SHA-256: ac6a32862ebc8cc4516220481bf76b91f0a9ad94ca292431db86c164b0ab4bc9
font_01_sfnt_off0000e9db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DB 10264 bytes
SHA-256: 2cb5a57801c461ae13abfc5a265fb6670f59da9a869b19d58fafc3e147a66338