Malicious PDF — malware analysis report

Static analysis result for SHA-256 76ee8a65780bf87c…

MALICIOUS

PDF

113.4 KB Created: 2021-03-24 01:50:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 42211c2c0abd194e77075e6e26557849 SHA-1: 86833836284f724123290e4a5201a15945af0bae SHA-256: 76ee8a65780bf87c6aa8f289519f4c570b825d78319df69a579ffa2bf118abec
126 Risk Score

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 0.9998

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
  • 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://xezojetit.ru/wix?keyword=cosmos+worksheet+episode+9 PDF link annotation
    • http://vutisonoj.sportsontheweb.net/report_attestation_form.pdfIn PDF document text
    • http://vazawujuzu.sportsontheweb.net/jofoxavu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457563/normal_5ffaee0283fa7.pdfIn PDF document text
    • http://rabiwitijif.medianewsonline.com/penise.pdfIn PDF document text
    • http://ziwigosopijulal.mygamesonline.org/snow_white_with_the_red_hair_fanfiction_obi_and_shirayuki.pdfIn PDF document text
    • http://wozufilugud.iblogger.org/74091040594.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455381/normal_5ffd4435d9f8b.pdfIn PDF document text
    • http://kakolamilasaru.medianewsonline.com/56538164811.pdfIn PDF document text
    • https://tixanesel.weebly.com/uploads/1/3/4/2/134234664/tutejivev.pdfIn PDF document text
    • https://zaketedojerobi.weebly.com/uploads/1/3/6/0/136023974/876764.pdfIn PDF document text
    • http://retelikilerodad.iblogger.org/lupalaze.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://woxedizoxe.rf.gd/whats_better_than_the_magic_bullet.pdfIn PDF document text
    • https://01d7ec8a-e38e-4e33-8c76-1be31754498b.filesusr.com/ugd/24d943_31be171742be4f59adf793fbdd0634d8.pdf?index=trueIn PDF document text
    • http://mobukug.myartsonline.com/hunger_games_chapter_10.pdfIn PDF document text
    • https://27420876-d215-4860-9a72-f48db0d0c320.filesusr.com/ugd/4062c2_136c013969994dacac8540c725596b9c.pdf?index=trueIn PDF document text
    • http://tavoxelelenasi.onlinewebshop.net/introduction_to_american_deaf_culture_chapter_10.pdfIn PDF document text
    • https://827a6da4-a69c-4806-aaaa-db522494bc4d.filesusr.com/ugd/cb5916_0e62bb83993644fea0a3dcd2e56a9022.pdf?index=trueIn PDF document text
    • http://bamemuwibe.epizy.com/geometry_textbook_answers_chapter_12.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_off000165b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165B7 6972 bytes
SHA-256: 9d066162192f85cc3c1f27d5dc5edfb8a9df11326353c347ea3b01be7276b359
font_01_sfnt_off00017d51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D51 5176 bytes
SHA-256: fb08b8266a8a3951db951342030c425ba8df712acbcf4cddb775a05f90730fdb
font_02_sfnt_off00018ed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18ED0 12208 bytes
SHA-256: d4476030d68f14f718d77db1a8e7e767c623b6a89be77667dcd2505eb3aa5c69