Malicious PDF — malware analysis report

Static analysis result for SHA-256 32ecbaeef8593b32…

MALICIOUS

PDF

76.6 KB Created: 2021-03-15 21:28:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 87881e405f7e6ce0e8ac8df337a36cdf SHA-1: fe5987feaa2bd9a975619e77f11d5563e70d4a60 SHA-256: 32ecbaeef8593b32687eb3d3946cdb929fba85ac8f90678c1de0ef9ebb7c8269
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. One of the primary URLs extracted is https://maypoin.ru/wix?keyword=st+thomas+of+canterbury+school+fulham, which appears to be a lure.

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://maypoin.ru/wix?keyword=st+thomas+of+canterbury+school+fulham PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372085/normal_6017ce63157ad.pdfIn PDF document text
    • https://kunugamonigosa.weebly.com/uploads/1/3/1/8/131871761/tenefil-toxutegekag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417221/normal_602e1d6a4d31f.pdfIn PDF document text
    • http://naguvogegexaze.22web.org/wotofaxulileluboxadotuxun.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414502/normal_5ff13cbbedfcb.pdfIn PDF document text
    • https://badobokitevobux.weebly.com/uploads/1/3/0/9/130969603/1752fe.pdfIn PDF document text
    • https://tedagenuv.weebly.com/uploads/1/3/2/6/132682668/xuximafinixu-mukusad-mijivedi-fesivawunazazoj.pdfIn PDF document text
    • https://nodekisoguzila.weebly.com/uploads/1/3/5/3/135313862/zunaz.pdfIn PDF document text
    • https://bewotababuruga.weebly.com/uploads/1/3/1/1/131163836/b2ccf7.pdfIn PDF document text
    • http://rexevivejegox.scienceontheweb.net/84926544560.pdfIn PDF document text
    • http://nomolizuxabid.22web.org/pmp_exam_prep_tenth_edition_rita_mulcahy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460460/normal_603426aca7cb3.pdfIn PDF document text
    • https://suwudaxodorepe.weebly.com/uploads/1/3/4/8/134885248/6a93d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421201/normal_602228e91828d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392861/normal_5fe0b4a922545.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412899/normal_5fd262b50d7bb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kewetevidelumuz.epizy.com/24048297846.pdfIn PDF document text
    • http://pidukuniwid.epizy.com/apple_watch_hermes_watch_face.pdfIn PDF document text
    • http://kakelosiditi.rf.gd/quicksilver_3000_classic_kill_switch.pdfIn PDF document text
    • http://novupomajanox.atwebpages.com/xigap.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_off0000eb7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7C 5468 bytes
SHA-256: 6f9072191864fc199c8d5f9e0813e3d57c90f2838568a4aab1d1f8cea3ca68d8
font_01_sfnt_off0000fdef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDEF 11424 bytes
SHA-256: 9406f7927330961152664acac4842900e0a3d3186abc85e42ca186e7a8f78028

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