Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8e8a8535d6d1443…

MALICIOUS

PDF

86.1 KB Created: 2021-05-01 12:50:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 33e9f436116ec845c0737ce1ca5517be SHA-1: 9aeddeac4da8bcbf6f84509d6e480eb4381d241d SHA-256: e8e8a8535d6d1443de4048538130beacb91bdce7e19836ab516dba55bb67ec69
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://dugedepap.ru/strik?utm_term=how+to+become+iso+27001+certified+auditor PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370528/normal_5ff6a0d95a0c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455390/normal_604d6733b97fd.pdfIn PDF document text
    • http://vizexibidoxi.getenjoyment.net/23614657830.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499999/normal_5fcd147e59514.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401712/normal_5fea40941a431.pdfIn PDF document text
    • http://xepuxesadara.mypressonline.com/sybcom_business_communication_notes_in_marathi.pdfIn PDF document text
    • http://rijebipimaba.getenjoyment.net/32771025445.pdfIn PDF document text
    • http://hookup153.site/6612519688radbq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369317/normal_5fde277f31fc0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453906/normal_5fe06a116dd0d.pdfIn PDF document text
    • http://mirumumavetifun.mypressonline.com/what_is_a_custodian_of_records_affidavit.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://katipef.medianewsonline.com/latimejotasiko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474223/normal_6023be4dee8a8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kawerulim.onlinewebshop.net/51183726439.pdfIn PDF document text
    • http://perexuwofogefo.onlinewebshop.net/75940571460.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/354d0fd0-330a-41c0-be37-8dad3172427f/carrier_58sta_error_code_31.pdfIn PDF document text
    • http://juborekif.atwebpages.com/50921590690.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da965707-4b7a-48a8-8793-900f3a7c4c4c/how_much_to_pay_for_a_logo_design.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49d7c20d-949f-44b8-9383-9e12eb5ddd28/56580611708.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7D 5732 bytes
SHA-256: 46f13c22f7e98d5f5982c22dacdfcca4d4586735b04d47c78ae2e467539ca101
font_01_sfnt_off00010e0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E0A 11864 bytes
SHA-256: 30a4498a7b72ac242c19a74c22cd5e66a75efa2b92a9b993b424e5f0fcfccd3b
font_02_sfnt_off00013547.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13547 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15

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