Malicious PDF — malware analysis report

Static analysis result for SHA-256 670444c1e612cdf1…

MALICIOUS

PDF

66.3 KB Created: 2021-02-11 17:17:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: db0489f9c07e92b88699e5f9e6047c75 SHA-1: 054d03a38c77c41843aed8b6c7b77c92df775dd8 SHA-256: 670444c1e612cdf117313d2e03c4cd4247ba0c6cced0d2d37f65054ba5157350
256 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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://nunipotewisi.weebly.com/uploads/1/3/4/8/134892443/37fcb800.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://druttle.ru/wix?keyword=popcorn+time+apk+download+2018 PDF link annotation
    • https://cdn.sqhk.co/bosamame/dhgjh0I/14553082549.pdfIn PDF document text
    • https://cdn.sqhk.co/wujakegu/gejbmja/40030791429.pdfIn PDF document text
    • https://nunipotewisi.weebly.com/uploads/1/3/4/8/134892443/37fcb800.pdfIn PDF document text
    • https://zevigutuxokalu.weebly.com/uploads/1/3/4/7/134769804/977644.pdfIn PDF document text
    • https://mutolumikiwow.weebly.com/uploads/1/3/1/8/131872082/gowejukemojotosipepu.pdfIn PDF document text
    • https://cdn.sqhk.co/joxipadij/hdghij2/paypal_account_temporarily_suspended_email.pdfIn PDF document text
    • https://matexofetuboso.weebly.com/uploads/1/3/1/4/131453592/pupul_mutejuw_zizujalunogobu_nipigimagod.pdfIn PDF document text
    • http://wimazosuwoxugij.66ghz.com/ma_sociology_notes_in_marathi.pdfIn PDF document text
    • https://garevanixuxud.weebly.com/uploads/1/3/4/3/134371644/raramelemop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vujiwexamofone.rf.gd/lixugesovufofova.pdfIn PDF document text
    • http://fuzumonezipozut.epizy.com/20087285873.pdfIn PDF document text
    • http://gajovab.epizy.com/united_nations_demographic_report_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/gorarudewokilemexul.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/31286412851.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/nozuw.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/depame.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_off0000c6bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6BD 5716 bytes
SHA-256: 97e7ea1a6618548135fb39bcde69713a93f5d911197987329e2227e510c6c547
font_01_sfnt_off0000da34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA34 9920 bytes
SHA-256: 0a45121384d718f03c2cbac3585f2307e11c2ba16d8bfa1360693d7ded22e0c9

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