Malicious PDF — malware analysis report

Static analysis result for SHA-256 f199316ba0f8e537…

MALICIOUS

PDF

71.6 KB Created: 2021-02-14 17:27:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 6f137ad5145847b14bf7156b8518c26f SHA-1: 7a3ff9910f00a752160d283a458366c926dc8a6a SHA-256: f199316ba0f8e537925a626a862e97748ce81cb4b52105f76ec90a8293ef7a41
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/wix?keyword=elements+of+electromagnetics+6th+edition+pdf+solutions PDF link annotation
    • http://vovidumuf.22web.org/customer_satisfaction_survey_template_excel.pdfIn PDF document text
    • https://pubotaxo.weebly.com/uploads/1/3/5/9/135962756/sixupuvovo.pdfIn PDF document text
    • https://rogujodur.weebly.com/uploads/1/3/4/8/134899240/3316831.pdfIn PDF document text
    • http://tefituguj.iblogger.org/wordpress_advanced_custom_fields_pro.pdfIn PDF document text
    • https://vubufogos.weebly.com/uploads/1/3/4/7/134766152/5694280.pdfIn PDF document text
    • http://derixen.22web.org/5495400301.pdfIn PDF document text
    • http://pusedoropeseb.66ghz.com/ma_pass_movie_full.pdfIn PDF document text
    • https://bikafosujikus.weebly.com/uploads/1/3/2/8/132815014/5105971.pdfIn PDF document text
    • https://kurixaxewa.weebly.com/uploads/1/3/1/3/131383664/ac7aeb88f8a1f8.pdfIn PDF document text
    • http://zumofujej.iblogger.org/guidesman_2500_lumen_flashlight.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388177/normal_6013bce312fe7.pdfIn PDF document text
    • https://vilekelapufixev.weebly.com/uploads/1/3/4/5/134508089/xokinijo-kexas-pijuletas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/budovewesekaz/subnautica_defense_platform.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/fonibapamojabiranekosezi.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/robbery_bob_game_hack_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/34246697340.pdfIn PDF document text
    • http://pevivudawof.epizy.com/binufoletiteji.pdfIn PDF document text
    • http://gevitejivojo.rf.gd/cartoon_elephant_images.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/43930337284.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000caa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAA4 5560 bytes
SHA-256: 298a2874dec68d59235c9afc6a69ea275929103dc75290e1e8c778b83bb8901b
font_01_sfnt_off0000dd5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5E 10996 bytes
SHA-256: 26f25d259538e0ff5907222949133402af29fc5d54582875f2212f0fff00ad87
font_02_sfnt_off000102d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D8 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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