Malicious PDF — malware analysis report

Static analysis result for SHA-256 88810e97e203b54d…

MALICIOUS

PDF

77.0 KB Created: 2021-02-25 10:32:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ff6a07a2a5b336bb1cebc8a6ce740f0b SHA-1: 79f36b41cf1f175810b108c761aee299a5e1aae1 SHA-256: 88810e97e203b54d11d1cdb10132423fff718c3d8b9f62f7b7cbbd1333b72b2b
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://leonvi.ru/wix?keyword=army+games+unblocked+hacked PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4495551/normal_601430f45c4b7.pdfIn PDF document text
    • http://bisibometixo.mywebcommunity.org/25207489182.pdfIn PDF document text
    • https://sanepawoja.weebly.com/uploads/1/3/4/5/134579143/wuzubuketijef_ledor_xatakulob_gujemeki.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/learn_to_write_arabic_calligraphy_omar_uddin_download.pdfIn PDF document text
    • http://kirakexig.mypressonline.com/bajigapetunejovediwum.pdfIn PDF document text
    • http://luwogexejel.getenjoyment.net/wamupijavewex.pdfIn PDF document text
    • https://kabulemumolitu.weebly.com/uploads/1/3/4/8/134869515/lipikamet_xifovowunapukiv.pdfIn PDF document text
    • https://kupujusurigov.weebly.com/uploads/1/3/4/4/134471221/d84a5.pdfIn PDF document text
    • http://bagerisevi.scienceontheweb.net/nosilinorojitikosunuko.pdfIn PDF document text
    • https://suxamoka.weebly.com/uploads/1/3/4/8/134876373/vowavogeka.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419820/normal_5feb0ddc13590.pdfIn PDF document text
    • http://zutatowatipo.mywebcommunity.org/orbit_model_57894_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382614/normal_6023f9207d2f3.pdfIn PDF document text
    • https://xupumoga.weebly.com/uploads/1/3/1/1/131164417/fowuwonulebigo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/bcbswny_medicaid_prior_authorization_form.pdfIn PDF document text
    • http://gadivedu.rf.gd/6005070685.pdfIn PDF document text
    • http://wabalegawamiraj.rf.gd/juniwodamawanetuwiso.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/greensboro_ga_weather_report.pdfIn PDF document text
    • http://panadokopejed.epizy.com/crystal_reports_viewer_license.pdfIn PDF document text
    • http://watawazorino.rf.gd/nidipovatapapugit.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF0 5648 bytes
SHA-256: a1883106035fbacca9efbf73f753af8bccc68b7400ad5d93e743d0aac6a73c75
font_01_sfnt_off0000f300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF300 5960 bytes
SHA-256: 84c9f15295723df3fdeb2b2bc711f74cdd97eeab6cc316d315e7d4483a9d0143
font_02_sfnt_off0001024b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024B 11028 bytes
SHA-256: ad7570a411128d3a241350f2678f79c165f0735b4c5918ee1a3cae2f52a85cd5

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