Malicious PDF — malware analysis report

Static analysis result for SHA-256 85af4c68e38622cb…

MALICIOUS

PDF

84.4 KB Created: 2021-04-02 16:42:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9e36a2392131150c4f32a9979cd74f48 SHA-1: d6a6a1e912e060f26faa50c6368755be065540e8 SHA-256: 85af4c68e38622cb76b469b71ca556c13d6d862c2eba7d124926194e8ef1bd21
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

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 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://jumiwimov.ru/strik?utm_term=how+to+get+chick+fil+a+points PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374533/normal_60459ca08a749.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380382/normal_5ff09595901d8.pdfIn PDF document text
    • http://zumufaxe.iblogger.org/jebomo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377377/normal_60664eb139081.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378382/normal_5fe058bca576e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401517/normal_60464349b00de.pdfIn PDF document text
    • http://monogawuw.iblogger.org/27462402298.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471275/normal_5fcaf5b49b816.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383460/normal_6001f3cba358f.pdfIn PDF document text
    • http://najitop.22web.org/jeweniwefosezufaf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473340/normal_5feea8d7c1bc1.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
    • http://vitoretosobiv.rf.gd/67314665332.pdfIn PDF document text
    • http://wewadem.epizy.com/controlled_substance_medication_log_sheet.pdfIn PDF document text
    • http://zawovasozanadi.epizy.com/wiwunowozategoduwi.pdfIn PDF document text
    • https://abf133a7-37c0-4616-b653-d99fd306bce3.filesusr.com/ugd/5c8236_124f0d46acea4b8385231c48a062e236.pdf?index=trueIn PDF document text
    • https://6754c94d-8795-460a-880d-d127bb37d4d4.filesusr.com/ugd/2383dc_5266192520b14196a95da093fffd4f48.pdf?index=trueIn PDF document text
    • https://d38713d8-f9e0-49bf-8e72-3f46774ce551.filesusr.com/ugd/b3faf5_419dee63e3914d8fbeeb6693fbf409d1.pdf?index=trueIn PDF document text
    • https://adea4596-07c4-4c45-ba97-107779ed6dc5.filesusr.com/ugd/5bd9e2_7229af56e07842f0a3d10c4d9ad156f9.pdf?index=trueIn PDF document text
    • http://domirewuzi.epizy.com/edible_icing_sheets_near_me.pdfIn PDF document text
    • https://e8c82854-2a0b-4c0f-82de-bac600ce06e6.filesusr.com/ugd/d017d5_7cbd9e046d6840418de86c25eae7efb9.pdf?index=trueIn PDF document text
    • https://4db61c00-1078-4917-8a1c-a2c1480eb6e0.filesusr.com/ugd/c94206_8aa492af0c3d4d1fa4b92eb4acc472c8.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE40 5088 bytes
SHA-256: 9905a4481c0c016c6fc019ed9d12bd51ccf836691b8f9867e8bbb187f7900d4a
font_01_sfnt_off00010f9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F9D 10936 bytes
SHA-256: d15840ad0532b92f95602b29a46ab64d1a8e120cf4981e04e553ea870b10491e
font_02_sfnt_off000134ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134CE 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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