Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1445616100618c2…

MALICIOUS

PDF

79.3 KB Created: 2021-09-12 09:17:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 09fa8934b28d33a48a4206ccea6cccb8 SHA-1: 8c23f5923b7561880cfd7c9f598bce03f0c292f4 SHA-256: e1445616100618c2d2d7308bf564693702ced0bb745a9701c15688354551cbdb
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to disposable hosting, a common tactic for phishing and malware distribution. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a method used to bypass gateway security. ClamAV detection and ML classification strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dp-engineers.com/admin/userfiles/file/nivonarosujefiwikelevevas.pdf In PDF document text
    • https://sgotomotiv.org/upload/files/ziteralerudepijenun.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/naguxosidofib.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/bb62ef35019099793b72058df62ed457/tefexesokakonipimatoxog.pdfIn PDF document text
    • http://www.vako.vn/app/webroot/uploads/files/21005585145.pdfIn PDF document text
    • https://conexusinternational.com/ckfinder/userfiles/file/23325708460.pdfIn PDF document text
    • http://oryginalnedekoracje.pl/userfiles/file/kuxosesomomane.pdfIn PDF document text
    • https://cr2tek.com/userfiles/Proj_Name/files/toregabujefudowuzew.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/64963679795.pdfIn PDF document text
    • http://business-baltic.com/myfiles/dok/79320525159.pdfIn PDF document text
    • http://nincity.de/inline/file/54802317348.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137af643f125---bivap.pdfIn PDF document text
    • http://studiomanzella.com/userfiles/files/dolopuromude.pdfIn PDF document text
    • http://aeusjtu.pretty-match.com/upload/files/20422205329.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/56022296866.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16137b47f0051a---bojegigano.pdfIn PDF document text
    • https://beldaoyun.com/calisma2/files/uploads/waboliwok.pdfIn PDF document text
    • http://yucehukuk.com/resimler/files/roxekokapikuwotegawewomed.pdfIn PDF document text
    • https://horgaszvelem.hu/ckfinder/userfiles/files/80624458261.pdfIn PDF document text
    • http://consorzio-csa.it/userfiles/files/34161496017.pdfIn PDF document text
    • http://www.casasemio.com.br/ckfinder/userfiles/files/86504079770.pdfIn PDF document text
    • https://xedulichhaiphong.vn/images/news/files/pikisulanetobagaleni.pdfIn PDF document text
    • https://bilegt.mn/userfiles/files/911269774.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=ramanichandran+novels+downloadPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD136 10732 bytes
SHA-256: 6683cb2c4406499c2f69f9fc3cd8b0007734dd29e9adcc992d0040027b740639
font_01_sfnt_off0000e9b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B0 17912 bytes
SHA-256: 3e5224c88b32163fed8dd9c95f7315741710f209bc0a0e2bb4e83e7b31c8f4a5
font_02_sfnt_off00011721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11721 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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