Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bac50ce85fb61ce…

MALICIOUS

PDF

111.0 KB Created: 2021-06-26 12:41:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 9444194a864b33d6e1b357a9f9fbbd41 SHA-1: 4af280910f191410523d5fc66b819aead2d63b42 SHA-256: 7bac50ce85fb61ce3e1216989f938447c952f97522ce5cde8323c059c7dff6ef
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs likely lead to malicious content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://laborke.ru/uplcv?utm_term=rajasthan+history+notes+in+english PDF link annotation
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/c5gvqhbcl8oijfcij5p7ampi92/lavajepiwimajuzejifavep.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160b55d97bbdfd---tukowebolukekibos.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/o6glnj4pgr06t4m33rlth5bie2/nanafomogadiwajutali.pdfIn PDF document text
    • http://e-district.org/userfiles/file/dogexaxawinu.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160cab5af34e6d---26198875785.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16078233eea34e---19821706860.pdfIn PDF document text
    • https://maggies-handmade.com/UserFiles/files/89011664700.pdfIn PDF document text
    • http://yuha.be/_files/file/nidowovefedoxekaserino.pdfIn PDF document text
    • http://bixenony.com/userfiles/files/jibidilikawofizofew.pdfIn PDF document text
    • http://erdbau-rauch.at/76850122530.pdfIn PDF document text
    • http://cityhigh78.com/clients/2/2d/2ddbae4fb74c169819b3574d76e4e264/File/97391178894.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/gmhgvhc7jvcvca3mgieg465pun/jejina.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f8c5aba742---kebikokanoropozegajej.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0e659dd77---22919747698.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/segiximuzikidikafes.pdfIn PDF document text
    • https://ahha.az/userfiles/file/gimuvogeja.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/fbd959088f50b79d01a88762747e610d/menajazon.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/dd7a1caf3e51d08c4c21dcf0fbfdf656/64521970015.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082b07d02012---fivajijatidebi.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/e53l8df060j8m39p6ae2e4iam7/wibadebutut.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a9b4315423---25806054529.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/t3rvcfdkja7ffp491q9e9mletu/rapuwavesulalutapajamula.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/06/24/file/70515923020.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/sapekelawinexemagubeg.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014def.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DEF 19304 bytes
SHA-256: ff31cf78a31806801c93cbd6f0baea26a682edb3445002ccaf58975f22afb50d
font_01_sfnt_off00017e2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E2C 10676 bytes
SHA-256: f6ac1adbab81e5b1b005a62a2cec260d70b47c88ac6855784247e03dfd05b744
font_02_sfnt_off000196a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x196A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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