Malicious PDF — malware analysis report

Static analysis result for SHA-256 88c9d095eeeffed9…

MALICIOUS

PDF

89.0 KB Created: 2021-07-10 09:04:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: db130154e6dbf9d357859386ca79cb72 SHA-1: e0a78c0cfd5d4920cf0f4c7e5e2ccf0a2caa96df SHA-256: 88c9d095eeeffed92de5725bf52e57c737ee89e7d4a50d53a2bc5a09f5301489
196 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and heuristics indicate it is a link farm pointing to compromised CMS uploads and disposable hosting. The document body, though heavily obfuscated, contains indicators consistent with an advance-fee scam, likely attempting to trick the user into downloading a further malicious payload disguised as a prize or delivery confirmation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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 http://phuongdonggolf.vn/app/webroot/uploads/files/sujegudazirajafunekiwo.pdf In PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094beb32b677---jamavulilefiralaxukunediv.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc92d3cf3d---kilis.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b01bf654b6b---voguxumirolilesekila.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/28c5dd25e2c61a56e595f1c94c21ef2b/81402128805.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9cf2980df6---dafesowapigalekakuv.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/dd09cf898e9c7ede69201d5579f29982/bizepitopi.pdfIn PDF document text
    • http://thsport.dk/ckfinder/userfiles/files/42828202838.pdfIn PDF document text
    • http://kezmosas.hu/files/file/kunavidifo.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096ba00e57ce---23843668804.pdfIn PDF document text
    • http://haiqi-machine.com/d/files/pafusoguvife.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c657c9bed96---13355938313.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/9hmpe2rpfjash4em1e2fa9n4u1/58148265677.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/493jjuonuks1fmi3defr2easl3/65557808625.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/17083784753.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/u3iuj68cs586qu0u35r333fajh/26995216036.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097d206035a8---60033517911.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f5243666c---mokikadisusew.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/c9674b49e58c7d2f4ced2cd4bfc9b8e3/sigobodanawinegewiwim.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3b87343ef---81427100288.pdfIn PDF document text
    • http://burragebrothers.org/demo/jolie/beta/userfiles/files/81048306867.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d7efed5dbb---pijelasulagabedewologipe.pdfIn PDF document text
    • http://sheeld.org/clients/d/d0/d021426cee8527c21a172be12ef3d645/File/venamidapo.pdfIn PDF document text
    • http://ahsaipu.com/v15/Upload/file/202151956531567.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=victoria+gowon+is+from+which+statePDF 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_off0000fb6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011382.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11382 10792 bytes
SHA-256: 0e98c2b92c34a48af6334350a97c865624519a2d451740809259d210340b16a9
font_02_sfnt_off00012c49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C49 16424 bytes
SHA-256: 5de47726c60a17d2420d1ab6b420810bd7bb3d09b428baae4f8eff25036dab44

Open this report in the interactive analyzer, or submit your own file for analysis.