Malicious PDF — malware analysis report

Static analysis result for SHA-256 c22a66cc4221aa11…

MALICIOUS

PDF

75.1 KB Created: 2021-03-07 20:15:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6818e4773240d75cbab6ffcdf8c80341 SHA-1: 5ee23a138362a9e09962ece50b0c4f85f4a4ba1e SHA-256: c22a66cc4221aa11f5179900797cbfaba226520aafafaacd0990d02c4e667461
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • 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://resalured.ru/wix?keyword=zombie+age+2+hack+apk+2019 PDF link annotation
    • http://vostokzapad.su/what_is_the_future_of_uspsbioyk.pdfIn PDF document text
    • https://vobulesije.weebly.com/uploads/1/3/1/8/131857334/koluvubedasuzu.pdfIn PDF document text
    • http://securespot.ru/animal_coloring_sheets_for_preschoolers2xnzr.pdfIn PDF document text
    • http://labifovejes.mypressonline.com/87468365600.pdfIn PDF document text
    • http://bedating.online/ghostbusters_full_movie_2016_putlockn4hk2.pdfIn PDF document text
    • http://zhigina.ru/espumisan_kapky_v_thotenstv1b4fg.pdfIn PDF document text
    • http://timelessdecorum.com/nafimokeronagacot2o.pdfIn PDF document text
    • https://dewajijivixire.weebly.com/uploads/1/3/4/6/134638152/b72b388b4a3.pdfIn PDF document text
    • http://hellovendi.com/mebinemuxejotalusoxawugupfed0.pdfIn PDF document text
    • https://nuduvoto.weebly.com/uploads/1/3/4/5/134589614/dazobururetav.pdfIn PDF document text
    • https://fusofopafufet.weebly.com/uploads/1/3/5/2/135294951/82dff872.pdfIn PDF document text
    • http://love-your-lips.online/9235738780096kdo.pdfIn PDF document text
    • https://wipowolulufobud.weebly.com/uploads/1/3/1/4/131437369/068200848dd4.pdfIn PDF document text
    • http://nat-yoga.space/91480595406cxqiz.pdfIn PDF document text
    • https://tabivivefevevu.weebly.com/uploads/1/3/4/8/134889686/b4401501aa7.pdfIn PDF document text
    • http://discout.online/ginseng_prices_in_kyysdge.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3b94b73-01f2-4601-bb78-52ca5084607a/1906402823.pdfIn PDF document text
    • http://donijexufenu.onlinewebshop.net/6213879773.pdfIn PDF document text
    • http://raxajabidadida.onlinewebshop.net/kadusexevukofela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d054aaa-a04e-456d-beaf-787cea5720fe/56585887167.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d9eaf38-a3fe-4020-8bd3-cecf60b80a1e/android_game_development_javascript.pdfIn PDF document text
    • http://rexefobixavater.myartsonline.com/how_to_calculate_volume_in_liters_from_inches.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_off0000e3b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B9 5684 bytes
SHA-256: 9e65dbfc9b9b45a7d65416cb35ed04de3a9d5f3b8ce670f13b7dc1be41c1d409
font_01_sfnt_off0000f6f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F9 12492 bytes
SHA-256: 4242b39b9ac025e99a5a70e5d076913034c6c206a07eedfe962030105283932a

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