Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2db895538e6e83e…

MALICIOUS

PDF

78.5 KB Created: 2021-03-20 01:44:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 732d5841e45a6f19cd08c28433e2890e SHA-1: ccb1aad24885b540476bc2ff435e2b068f70edcb SHA-256: c2db895538e6e83e21de961c5ce9d46d30b117d79a1acf8baab0b429f01af7ec
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many hosted on disposable domains, and is flagged by heuristics as a link farm designed for SEO manipulation. ClamAV and ML classifiers identify it as malicious, likely a phishing or trojan delivery mechanism. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious sites, potentially for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/123?utm_term=reverse+chronological+order+resume+format PDF link annotation
    • https://defiduzumuxel.weebly.com/uploads/1/3/2/6/132682342/ebaf202fe3385e7.pdfIn PDF document text
    • https://nunodovov.weebly.com/uploads/1/3/1/3/131380210/fopudezer-bozaxip-newafafupi-jeratagakenot.pdfIn PDF document text
    • https://bekazavaf.weebly.com/uploads/1/3/5/3/135327011/vorug_mirilunofokig_vegozorexenazu.pdfIn PDF document text
    • https://cdn.sqhk.co/kukusagufo/luWkukN/espers_ff12_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421040/normal_5fe76d69627f8.pdfIn PDF document text
    • https://cdn.sqhk.co/jujejorule/gggEKBd/gutapakuwenop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456399/normal_604506b22efcb.pdfIn PDF document text
    • https://cdn.sqhk.co/nupegefozub/jcmhhe7/mewezovixadejebori.pdfIn PDF document text
    • https://cdn.sqhk.co/tevunufoba/bXjizgd/kebajurexoji.pdfIn PDF document text
    • https://daxivikulogator.weebly.com/uploads/1/3/4/3/134308382/jexatupitupig_makuvunuxa.pdfIn PDF document text
    • https://cdn.sqhk.co/viwiratoposu/aSgdGMF/pubukinivoxofemazizofokun.pdfIn PDF document text
    • http://lexibanoma.iblogger.org/assets_in_accounting.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/e901f3d9-fd8b-4156-9c3f-746500571f13/how_to_write_a_summary_news_lead.pdfIn PDF document text
    • http://nimoxorud.epizy.com/python_format_c_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6148891f-6dcc-4429-80a3-27d269dcc9d8/75320969994.pdfIn PDF document text
    • http://zovewopot.epizy.com/74933044166.pdfIn PDF document text
    • http://xulitapaxi.rf.gd/safety_not_guaranteed_movie_ending.pdfIn PDF document text
    • http://folizel.epizy.com/couchbase_java_client.pdfIn PDF document text
    • http://xuxinoniruxisu.rf.gd/nowizukore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c6b8986-34d4-4b7e-a88d-6fa7baec299b/zikoxijodagakimegu.pdfIn PDF document text
    • http://genenapukiral.epizy.com/18799451219.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_off0000f3d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D5 5500 bytes
SHA-256: 5d71f09c333872ec2c1c5d4b7ee21b6b8f13c1966a6858a29ef071b12c6e50b2
font_01_sfnt_off00010672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10672 10668 bytes
SHA-256: ef8d4f6634c6a830660c8e2e7d94673624bb9c3363fc80c16f5aefae59bc4e61

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