Malicious PDF — malware analysis report

Static analysis result for SHA-256 e38d0aa8cbebcb1b…

MALICIOUS

PDF

76.3 KB Created: 2021-03-14 22:08:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 82d59ab154bc338cd99b4afcda022e38 SHA-1: d9b02104ccb478575ba77be479e9e0cea85c720a SHA-256: e38d0aa8cbebcb1b3c5b5a3afe48471ad2ba58bb7e5c794626b872ffa7a0e818
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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=vainglory+apk+only PDF link annotation
    • https://mobisikude.weebly.com/uploads/1/3/1/6/131606420/4583128.pdfIn PDF document text
    • http://onatural.space/biogeochemical_cycles_answer_key8t8ik.pdfIn PDF document text
    • https://wipiwabe.weebly.com/uploads/1/3/4/4/134438476/4777548.pdfIn PDF document text
    • https://pimujupaz.weebly.com/uploads/1/3/4/4/134440235/8790919.pdfIn PDF document text
    • http://presentinsta.online/eclipse_java_decompiler_pluginav1xx.pdfIn PDF document text
    • https://mulokigapasol.weebly.com/uploads/1/3/1/0/131070847/7635798.pdfIn PDF document text
    • http://return-0.com/police_gun_auctions_washington_stateqxcml.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/88b6c3b0-06f8-4aa2-853b-180159460719/can_you_replace_knobs_on_gas_stove.pdfIn PDF document text
    • http://judafigot.rf.gd/how_to_resolve_force_into_components.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/strongs_concordance_2127.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/mepapu.pdfIn PDF document text
    • https://8eefcaf3-52f5-4123-8be5-b1f0aaeea45e.filesusr.com/ugd/1d3654_2d86d3a08f4441c491d5a023e52beba4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/42110403078.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf94da3a-2a69-4ad3-8b34-2a40e2e96c45/tosamu.pdfIn PDF document text
    • http://nakapuzukatojog.rf.gd/berean_reformed_fellowship.pdfIn PDF document text
    • http://jijazofar.rf.gd/letter_of_resignation_template_ontario.pdfIn PDF document text
    • https://eb40363d-1d1f-4170-a897-f23f0f433116.filesusr.com/ugd/2a1429_f18625aa032e466ea1865a8307e18fb5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e78b87f-b05b-4dd6-8d18-4d06606781bb/41077152537.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46904cac-3d97-41c2-a22a-d2e3463e02d5/what_is_wifi_direct_on_a_brother_printer.pdfIn PDF document text
    • https://13fad4bf-7224-44b3-802b-16842e97d241.filesusr.com/ugd/b14664_e49fb4e938e442dba2583ff2244fa7ea.pdf?index=trueIn PDF document text
    • https://00c0516a-c822-4344-a779-6f74e039753d.filesusr.com/ugd/9e41f0_7ae9e74404a240c7b01d72e710f26c8d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/embedded_journalism_reports.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_off0000ec59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC59 4940 bytes
SHA-256: cd45f268a89c5a033e3e0461e176cad68392b37896741c7e1996aa48ed4a0402
font_01_sfnt_off0000fd49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD49 11044 bytes
SHA-256: 182ca087d465beba3dbb30021ccd493802ccb8c78235fb4583bc6974d91d5aba

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