Malicious PDF — malware analysis report

Static analysis result for SHA-256 17b57606e57da90b…

MALICIOUS

PDF

79.3 KB Created: 2021-04-24 21:09:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 936d6ccbff7227b9f3626afb054cea88 SHA-1: ef2bfb60b8a3d6b547afe275ce707e2f37fb047d SHA-256: 17b57606e57da90b2f38bbf7f0058bb2e58f9859cc396d2872e8b93f8167e14b
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 0.9997

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://lozipotod.ru/strik?utm_term=2018+subaru+forester+2.5i+premium+gas+mileage PDF link annotation
    • https://salobomuxalevi.weebly.com/uploads/1/3/1/0/131070078/gizogexoteviteg.pdfIn PDF document text
    • https://cdn.sqhk.co/rifokinimito/5hgjfge/8011191257.pdfIn PDF document text
    • http://runojiwum.getenjoyment.net/zumirubujobuvikipi.pdfIn PDF document text
    • http://tujofifebituxuv.22web.org/tamil_album_songs_2019_free.pdfIn PDF document text
    • https://cdn.sqhk.co/makulowujip/z6UhgmW/converting_fractions_to_decimals_worksheet_doc.pdfIn PDF document text
    • http://tofoxewesaxizuz.mywebcommunity.org/6479680207.pdfIn PDF document text
    • http://midimox.getenjoyment.net/benim_hocam_tarih_2020_soru_bankas.pdfIn PDF document text
    • https://cdn.sqhk.co/fajoliteve/zjc3AzE/12878628170.pdfIn PDF document text
    • https://zuvagojajom.weebly.com/uploads/1/3/5/3/135398962/gudaninixuwedax.pdfIn PDF document text
    • http://refixewu.iblogger.org/should_mobile_phones_be_allowed_in_school_debate.pdfIn PDF document text
    • http://jakiduve.scienceontheweb.net/back_to_back_stem_and_leaf_plot_worksheet.pdfIn PDF document text
    • http://defexol.22web.org/luranasudok.pdfIn PDF document text
    • https://cdn.sqhk.co/boxokozofe/x2hiWii/7811638157.pdfIn PDF document text
    • http://paxosij.mygamesonline.org/91244303857.pdfIn PDF document text
    • https://zatagigozot.weebly.com/uploads/1/3/0/7/130775916/846c91a9373.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rironedonigebi.epizy.com/antara_injection.pdfIn PDF document text
    • http://xilixuludomiti.rf.gd/899471321.pdfIn PDF document text
    • http://jagomizaf.atwebpages.com/africa_house_plans.pdfIn PDF document text
    • http://pijosufun.myartsonline.com/jigolizolinevimugogifet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b8099ec-cf75-421a-a73b-b4d5deb031f3/kilunaluxitu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f66183b2-c268-49f6-8f63-858ba751037a/wujugigavudugulal.pdfIn PDF document text
    • http://vumamuv.myartsonline.com/sipatuxinimajujur.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_off0000f378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF378 5944 bytes
SHA-256: 22065e8c582e14ae591ec688848eca353769faa866d6687bd74c5341c06810a4
font_01_sfnt_off000107a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A6 11828 bytes
SHA-256: 8da00b74968c7a696a6708e50e744d36850adddee60c5c1c521f55cb91e997de

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