Malicious PDF — malware analysis report

Static analysis result for SHA-256 77c1636dd2107361…

MALICIOUS

PDF

88.3 KB Created: 2021-07-02 03:04:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: cbfd3786c05720748f1ce4e8f30633f1 SHA-1: afe9411d51215d195b7e7050400eaf1597c250bb SHA-256: 77c1636dd21073614ee0e88a522ef7b70176afdd0cdcf642b6b5a7eadbc3c09b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and link farm heuristics, indicating it's designed to redirect users to potentially malicious websites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the structure and URL patterns are typical of malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • 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://oniceh.ru/uplcv?utm_term=winter+wreaths+for+outdoors PDF link annotation
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/c7b7c3bdee82f812a3ce9fb779dbe759/lutigojisasenexe.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/29c513d31abe779669960f00b838963b/dubilisunorinutovose.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/varilaz.pdfIn PDF document text
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/o66q2berura3bvd68di028nrna/terob.pdfIn PDF document text
    • http://wohingltd.com/userfiles/7611044381.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/56141665194.pdfIn PDF document text
    • http://winfielddeli.com/ckfinder/userfiles/files/77825792229.pdfIn PDF document text
    • http://citra.cl/userfiles/file/64815491363.pdfIn PDF document text
    • https://limpiezasinasel.com/userfiles/files/fulupalavaxol.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a448e084821---14959432067.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/00a94822b274487705792cd8a6777a89/97636216819.pdfIn PDF document text
    • http://murasakijr.com/uploads/files/10200731142.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/6805408593.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/39582663574.pdfIn PDF document text
    • https://marwaautorepair.com/nbloom/fckuploads/file/19240740109.pdfIn PDF document text
    • http://xn--54-dlcdkamdj4btild5b.xn--p1ai/ckfinder/userfiles/files/viloved.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/68a30f3cf4c36f47573a5b3c1598114a/nudebedojubifiben.pdfIn PDF document text
    • https://brazilairporttransfers.com/ckfinder/userfiles/files/rivepobozofoxul.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160b7476d435dc---97487403747.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a39f2a8153b---tifirikazira.pdfIn PDF document text
    • http://tilestone-pools.com/i/File/72551095585.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608f08d24992f---zejokivakapux.pdfIn PDF document text
    • http://thallo-food.hu/uploads/ckfinder/userfiles/files/gerapubokodexubatuguwekog.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a558043ff98---judekidusedulujo.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://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_off0000f88b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF88B 10584 bytes
SHA-256: a2e0af20249c539616050aebc33758a72abbb4d0c6b725d354e0b19a56272f0d
font_01_sfnt_off000110ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000128cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128CC 16624 bytes
SHA-256: 21049ecc4651e4d957d9ba0942b74814012fc3fe300f0aadc5425386662f4d88

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