Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfe58da213d67b22…

MALICIOUS

PDF

72.5 KB Created: 2021-02-28 08:47:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 7a2afc43f1ca53306830275e8764e309 SHA-1: 2c1c16753c80a825e96c188c0ea2b43f2677c2bd SHA-256: cfe58da213d67b222fa1ab75e29f6913803e6fe730f4bd6589aff2b752ed0135
256 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://larulesa.weebly.com/uploads/1/3/4/7/134717423/zarokowajijejov.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://fokemale.ru/wix?keyword=1999+kawasaki+vulcan+1500+service+manual+pdf PDF link annotation
    • https://larulesa.weebly.com/uploads/1/3/4/7/134717423/zarokowajijejov.pdfIn PDF document text
    • http://pay-order.info/xatitesusa1qj6b.pdfIn PDF document text
    • https://nujokolove.weebly.com/uploads/1/3/0/8/130874035/4349832.pdfIn PDF document text
    • https://buzapakamewogu.weebly.com/uploads/1/3/4/3/134366326/pifedogikuvim.pdfIn PDF document text
    • http://weinmvc.net/41725270749h1abn.pdfIn PDF document text
    • http://wide-take.top/bstc_answer_key_2020wyw66.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/kovezodepugov/juzonuj.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/gangtok_tour_guide_in_bengali.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/fortune_teller_template_editable.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/solineponetugex.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/lagu_brightside_lil_peep.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_off0000dcd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD3 5896 bytes
SHA-256: 67de00d76fb62262c3f9a8b322e28e5519174d6c7770720fc260c9ca273e05bd
font_01_sfnt_off0000f0f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F6 10036 bytes
SHA-256: 6c93f1afc58abb77354b734600a5a46b78b704a2f0876c6e3c2fb72f26d35f74