Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3a3852a877e25c4…

MALICIOUS

PDF

73.1 KB Created: 2021-02-23 13:23:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 38c45bda7db4ad545e842c415dbd9be1 SHA-1: 53e3d9e2ba374e787371b17b87d6f0d8ee994005 SHA-256: f3a3852a877e25c4a6685abc06becd7f09341db206f9dd8938057b37dac77ead
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yafferge.ru/wix?keyword=fellowes+saturn+125+laminator+manual In PDF document text
    • https://vumokaxizojomij.weebly.com/uploads/1/3/2/6/132680848/8977295.pdfIn PDF document text
    • https://cdn.sqhk.co/kegufamop/mgtmgdN/82929443424.pdfIn PDF document text
    • http://xugixejale.22web.org/wafulufuz.pdfIn PDF document text
    • https://cdn.sqhk.co/modajili/0QrdsR1/70593712929.pdfIn PDF document text
    • https://cdn.sqhk.co/xavonepez/jcMhgFp/letuzazelilojovarofemuz.pdfIn PDF document text
    • http://xofazonir.iblogger.org/2016_idsa_pneumonia_guidelines.pdfIn PDF document text
    • https://cdn.sqhk.co/ragonujip/c5ihfAB/love_live_sunshine_groups.pdfIn PDF document text
    • http://lojupubevodi.22web.org/47169063427.pdfIn PDF document text
    • https://kikosezuzo.weebly.com/uploads/1/3/1/3/131378972/eef7332c4a0ae.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://madukavinoxonal.epizy.com/ark_all_saints_academy_ofsted_report.pdfIn PDF document text
    • http://dolasuwukino.epizy.com/32003684441.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/able2extract_online_to_word_converter.pdfIn PDF document text
    • http://voxinuxo.epizy.com/red_formal_dresses_long.pdfIn PDF document text
    • http://jisixapuwalim.epizy.com/muwuxilidifutugu.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/drupal_interview_questions_and_answers_for_freshers.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/bearing_designation.pdfIn PDF document text
    • http://fijazuzid.rf.gd/43670386712.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/54962200582.pdfIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/64939726334.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4CF 5184 bytes
SHA-256: c8d8994fb4636ae6640830ac9242ae20a0f88ad4367e4328981434fc832793be
font_01_sfnt_off0000d67a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD67A 13448 bytes
SHA-256: 5e1dfb54f4e1116cb622a20858952e415f5c2761b165f765cedab707aadc4735
font_02_sfnt_off00010150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10150 16240 bytes
SHA-256: 1cbb36bb7b1d233ee9f5c2cce214d5b3269f5c1575f9f3c623519b72eb7db796