Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dd86ed743d2d3be…

MALICIOUS

PDF

54.6 KB Created: 2021-01-23 15:29:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: b85f4fedc209628b52c1d903024c3f36 SHA-1: 554893904026d9b02ab0be11c4e22190f43b3ad5 SHA-256: 9dd86ed743d2d3be6db57ffba5b6eb2567174b590f0bbd8f2f14a1f78e140921
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains text related to government forms, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9709

Heuristics 5

  • 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
  • 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/aws?utm_term=gobierno+del+estado+de+chihuahua+formato+isn PDF link annotation
    • https://molisepav.weebly.com/uploads/1/3/5/3/135347716/wodivupade-jefizasa.pdfIn PDF document text
    • https://fanakigefepawaf.weebly.com/uploads/1/3/0/8/130873796/3507628.pdfIn PDF document text
    • https://wujipiledulom.weebly.com/uploads/1/3/4/6/134695719/e50813244fc75e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456132/normal_5fce8c2836a1b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406455/normal_5fe40bd66df05.pdfIn PDF document text
    • https://gilinolejokakis.weebly.com/uploads/1/3/4/6/134632374/0a16224.pdfIn PDF document text
    • https://cdn.sqhk.co/kerutadit/igi0Wjf/zokalonijenudivudisus.pdfIn PDF document text
    • https://cdn.sqhk.co/dalegoti/hHvDjha/6272938130.pdfIn PDF document text
    • https://webenewosa.weebly.com/uploads/1/3/1/4/131409170/pavofa.pdfIn PDF document text
    • https://kaxamixerev.weebly.com/uploads/1/3/2/7/132712358/bovuwedewesipe.pdfIn PDF document text
    • https://cdn.sqhk.co/raxoxawupej/iejidhd/amazon_for_tablets_app.pdfIn PDF document text
    • https://jizufolikoni.weebly.com/uploads/1/3/4/3/134349493/9a7dfc7bf2f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lokimutopilar.epizy.com/55889737805.pdfIn PDF document text
    • http://fobupozomorefiw.epizy.com/functional_python_programming_2nd.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/chammak_challo_jara_dheere_chalo_gana.pdfIn PDF document text
    • http://fipiwafupogo.epizy.com/enl_group_annual_report.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9AF 5432 bytes
SHA-256: dbdcbc7956a35c9a791a42910df58a1e01bba78f0c56363ac1572b4e8d22fe31

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