Malicious PDF — malware analysis report

Static analysis result for SHA-256 e752221573c47eba…

MALICIOUS

PDF

69.2 KB Created: 2020-12-04 17:23:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: fca52de9eec326bb1b9e0e6e2e38cddf SHA-1: bad39c5ab9dfb2ceb38e680f59c3cf976941f69a SHA-256: e752221573c47ebacf23723a66372729607e777501d49b03907158ab4e58e6c0
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

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.
  • 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://trafficel.ru/wb?keyword=design%20of%20retaining%20wall%20excel%20sheets%20aci PDF link annotation
    • https://wesoxiworikezux.weebly.com/uploads/1/3/1/3/131380467/gozedifatos.pdfIn PDF document text
    • https://vojitimene.weebly.com/uploads/1/3/4/5/134596684/4affb3e3a6329.pdfIn PDF document text
    • https://tololomajaju.weebly.com/uploads/1/3/4/4/134472688/1280779.pdfIn PDF document text
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/9c521.pdfIn PDF document text
    • https://geromebazur.weebly.com/uploads/1/3/4/8/134895645/fifosiges-bepat.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/porukofosu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/56405874-d7d5-4f2a-8f80-b080e9da3010/propiedades_volumetricas_de_los_fluidos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71d1757e-ff5a-4286-84d1-cad83b5f8a94/92856561287.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/word_form_math.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/411d2a65-2d75-40d4-9313-6a4abcc248dc/nuxobafuluwonas.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/40012383998.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/920759a7-5498-4261-bfda-8093cc3b7f45/lord_of_the_flies_vocabulary_chapter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c4061cd-db6b-48d5-a99c-413dd4ad53ec/mott__bow_marcy_fitted_crew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/731eaa50-51b1-40a4-a281-e86aa1e9bbfc/raxilab.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7CC 5092 bytes
SHA-256: 3cb9486f99e62f9d8a207b5d2f4d6f4054b5f1e11823ea19a998c7716bf6a7b4
font_01_sfnt_off0000d927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD927 9576 bytes
SHA-256: d13ca406946f27c66ef164c5d201095dabc7b5ea2116eb19d6ce40160771b810
font_02_sfnt_off0000f9d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D7 4324 bytes
SHA-256: 8405bb6ca9a6fb718a2e910e1cdde4d74ac2122cab0061dc5f772322db9c7ccd

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