Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ced336badfaf48d…

MALICIOUS

PDF

145.2 KB Created: 2020-11-11 15:07:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: b94cabfc935b6f6f7333804abdbc4d80 SHA-1: 14f31a181e4d1c336032f5ccbc4bfcb2c557a627 SHA-256: 5ced336badfaf48d638be27fc2c596ef87648cb463805fc8769934bbd5f6ec61
224 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1534 Internal Spearphishing T1059.007 JavaScript T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses brand-impersonation credential phishing and an urgency-based lure. 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 0.9992

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://morozosewiveloz.weebly.com/uploads/1/3/4/3/134387595/9571776.pdf.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffine.ru/aws?utm_term=ps4+controller+games+unblocked PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368487/normal_5f884e52ca6a4.pdfIn PDF document text
    • https://morozosewiveloz.weebly.com/uploads/1/3/4/3/134387595/9571776.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402720/normal_5f9377bf27c42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384144/normal_5f9a91198f50b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418777/normal_5f96264bde56e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373770/normal_5f8ccc19c6a5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367617/normal_5f9463ef51ab9.pdfIn PDF document text
    • https://zovotinaselon.weebly.com/uploads/1/3/4/5/134589175/tuzab_jemumuxuz.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/60ec1cdc-07d0-42f7-ad93-c12b6ec862e6/mighty_mule_502_dual_troubleshooting.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/xuvudomeronanuxukesexi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb77c349-d4bd-4c94-a712-9acfc44122c7/76491879872.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f9dffb7-4d3e-4297-a54d-ed01fd156dfd/zerupusujopogo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e1f4623-02e8-4fae-81d1-fab4029a0552/wabexuziloratijonojeluzoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8806fd5-5b1a-407e-8959-2c91d4ce29e3/1977_harley_davidson_sportster_service_manual.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_off0001eee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EEE4 3008 bytes
SHA-256: 9f830758550a5d7eec7a3401ff9c41410162a62ac368f969b5254d9c9bd5d3b6
font_01_sfnt_off0001f9a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F9A6 5552 bytes
SHA-256: ae530235b9292350d9deedd8b7f7745735f90ccb52916cbb0bf886318da99d40
font_02_sfnt_off00020c78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20C78 12900 bytes
SHA-256: e0fb362d8e851c64c8681d9fc6792d6f15ffa25afb138b030b51c05396059f31

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