Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ab42dcf141d6a23…

MALICIOUS

PDF

72.1 KB Created: 2021-02-17 17:33:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: a476eb95bb52c2a039708d656d7ef196 SHA-1: 132f6e604624d04eaf055154a608dae51c003756 SHA-256: 6ab42dcf141d6a23f8be8531a59a8b10fc66d5bb63c5c27c8791fb3401bab367
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/wix?keyword=download+allcast+apk PDF link annotation
    • https://rizafosukozesal.weebly.com/uploads/1/3/5/3/135346652/b044482c930.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447626/normal_5ff66d61ab8a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418170/normal_60185c212a4f6.pdfIn PDF document text
    • https://wawupibinotab.weebly.com/uploads/1/3/4/9/134900246/2366752.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459466/normal_5fe5ef30ab8e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379742/normal_5fd78b9e14669.pdfIn PDF document text
    • https://wexemexaxixu.weebly.com/uploads/1/3/4/7/134709907/312822.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388276/normal_5ff860e88cf2e.pdfIn PDF document text
    • https://lufisadoxusixa.weebly.com/uploads/1/3/4/5/134583632/c261c1bd795e17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401692/normal_6025dc394d562.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448743/normal_5fcd3e3799d5c.pdfIn PDF document text
    • https://xazebuwojij.weebly.com/uploads/1/3/4/4/134467588/loted.pdfIn PDF document text
    • https://nelemiken.weebly.com/uploads/1/3/4/7/134704654/7640263.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469834/normal_601be53616a47.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500877/normal_5ffad24291981.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490133/normal_5fdc14d7a4542.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481509/normal_5fc6b0f70f05e.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/lomiwexuva/r15_bike_images_free.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/selenium_automation_estimation_template_xls.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/meletakugiditegag.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/software_engineer_interview_questions.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_off0000d215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD215 5128 bytes
SHA-256: caea3b1146f4200efbd6203431de9fe58e52ddc73f2dce51a59a9d136359707f
font_01_sfnt_off0000e3b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B9 14336 bytes
SHA-256: 5bee0aaad60004383ac1b2afac0c4dd5b28e873e503f1e981c31606f2ce32a55