Malicious PDF — malware analysis report

Static analysis result for SHA-256 df044e96453dc2b8…

MALICIOUS

PDF

75.2 KB Created: 2021-03-27 23:45:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: fc8b204ed65416c97b7db858cd041700 SHA-1: 131ad426396047f168d1f55764df651c528297ef SHA-256: df044e96453dc2b8513f2b893161f7fb1602e375c3514fcca38518dbcf016c81
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/123?utm_term=assault+cube++para+windows+7 PDF link annotation
    • https://tasidumil.weebly.com/uploads/1/3/2/6/132680907/xafemaresejuzak.pdfIn PDF document text
    • https://lufuneliza.weebly.com/uploads/1/3/2/6/132682735/0d85021e74.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408984/normal_5ff92ce0172e6.pdfIn PDF document text
    • http://lnstagramcopyrigtservice.com/xofivekak1i2qt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449973/normal_601fb2694009e.pdfIn PDF document text
    • http://ing-jobs-opportunities.com/sintra_pvc_sheet_australiantofd.pdfIn PDF document text
    • http://copyrightsupport-ig.com/bawudamofemofiduodke8.pdfIn PDF document text
    • http://voicebftyi.com/zesujalijuvegigovof6ierx.pdfIn PDF document text
    • http://itali-big.space/91561659124mfpco.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372955/normal_601fea13d2107.pdfIn PDF document text
    • http://uchebnoe.website/how_much_can_a_vacuum_leak_repair_cost3kiwc.pdfIn PDF document text
    • http://obmenkalnr.online/razejavibugibekisab6j82p.pdfIn PDF document text
    • http://vknart.xyz/jiwifc2eaf.pdfIn PDF document text
    • https://fodumalape.weebly.com/uploads/1/3/2/6/132695584/27b7f172.pdfIn PDF document text
    • https://sanevofodi.weebly.com/uploads/1/3/0/9/130969150/f1ddcdff.pdfIn PDF document text
    • http://mbfsopg.com/treasury_challan_form_online_haryanabrl6d.pdfIn PDF document text
    • http://mivetys.xyz/netflix_mod_apk_2018_tlcharger_pour_android1vwar.pdfIn PDF document text
    • http://microbladingeyebrowsdallastx.com/72368720720fpei7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484364/normal_601742cb5fe44.pdfIn PDF document text
    • http://tihefers.online/what_chemical_do_you_need_for_coleman_hot_tub28wcr.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/e0f23e86-b4a9-4d4b-9da3-719b37e95621/74516970722.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11e38567-e1d3-4ded-b148-9753c00954bb/xevalokebur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1955e316-a1b8-4f16-9434-a0fd63b9cd01/feng_shui_flying_star_chart_2021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dfd7c97-4b39-4c25-8447-7f340acf7137/garmin_delta_sport_xc_user_manual.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_off0000e8b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B0 5368 bytes
SHA-256: 841361086e067e40550fbee9ddd9df389b49cb1bf1f1f93843175d430d430b0f
font_01_sfnt_off0000fb16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB16 10664 bytes
SHA-256: 60041b398ad2819b806fd6d5215fcbb567d8c5519d60a2d974fbc9b3431e33ef

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