Malicious PDF — malware analysis report

Static analysis result for SHA-256 57d617520267b061…

MALICIOUS

PDF

75.0 KB Created: 2021-03-27 17:53:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 22e676db9c6e89e813d8c69d0254c41f SHA-1: f1e685e34a539ab66c167f0705045b752705ac85 SHA-256: 57d617520267b061938e7f0c00331f2510d2f07ad1a1e962b6ad6f797b93a535
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload delivery attempt. The PDF contains a large number of external links, with one suspicious URL (https://jumiwimov.ru/123?utm_term=celta+answers+application) being the primary indicator of malicious intent. No scripts were extracted, but the presence of numerous links suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://jumiwimov.ru/123?utm_term=celta+answers+application PDF link annotation
    • https://cdn.sqhk.co/nikamegamu/bBZjgVx/style_guide_for_coding.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453333/normal_5ff2e278a01eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448995/normal_605aaae944c49.pdfIn PDF document text
    • https://cdn.sqhk.co/dodirijobadi/fjjqbSW/amazon_kindle_app_for_android_tablet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369150/normal_603bd36752251.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408987/normal_603cb2282d968.pdfIn PDF document text
    • https://cdn.sqhk.co/lupobikud/jiUQ2h8/hp_smart_app_not_working_iphone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459777/normal_6036827d46dc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500668/normal_600e529ff3425.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394073/normal_5fedecf9e823d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383170/normal_6044f4bfeb12f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4adff18d-dc39-4349-be2c-eeb12737f1cb.filesusr.com/ugd/9117e0_1654ecbbc47d464e8fee7cb54ed9bb42.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3701cc1-b6f2-4736-8888-b1ee76d474db/glacier_bay_pull_out_kitchen_faucet_repair.pdfIn PDF document text
    • https://492f55f4-3442-4b37-b17e-39d9f2f0ae8a.filesusr.com/ugd/7dfe85_128cd5edc54a461ebb116eb9c004f14f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4753981e-8acb-4b43-a9d8-2598632362e9/warcraft_2016_film.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92e02b4c-c4cb-4a38-90c5-209125524fd2/fegubotedumu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cb081f8-07ad-445b-b574-d59882274519/79020795335.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95de6bde-bd30-4857-971e-d49d3a1abdd5/xifesatefonaxurom.pdfIn PDF document text
    • https://32b33340-d9da-4ef7-b3bd-a0ac5134eb71.filesusr.com/ugd/adfa6f_e04014437d3d4143b701b7e2e9eec1c9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ef7be4b-07f5-405c-80e7-00b6b3c7754c/22152104831.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b723d2dd-a008-4b7a-9a0b-a5eca34d91c7/senior_cloud_engineer_salary_canada.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_off0000e7f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F8 4924 bytes
SHA-256: 984a25d3aeef14b9ceb50f3bdf51512f7dc7106761f948f14fe565a8dc556712
font_01_sfnt_off0000f8d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D8 10800 bytes
SHA-256: d1590352cc6b03ca09a6fe535dccdc563ab44e42399b81f21499e274a4ac5e0a