Malicious PDF — malware analysis report

Static analysis result for SHA-256 40c9e7ee38c17dc1…

MALICIOUS

PDF

85.5 KB Created: 2021-07-18 14:09:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: ea21abec45095a5deee329f8cdfbb88c SHA-1: f175ce3f7ade088fdc42bab40dc309fbba2716e7 SHA-256: 40c9e7ee38c17dc1db9d1bbd56d9d2a535bb4d5b669472add0fa003780fa15ee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to numerous URLs, many of which are hosted on compromised WordPress sites. The presence of these links suggests the document's primary purpose is to redirect users to potentially malicious or phishing content, aligning with the characteristics of a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://lescourailleurs.com/upload/editor/file/83868714744.pdf In PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/424b958cd24715ffe4f885c48f5e13f7/60455601836.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/gawinirejupupuniga.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cabb104d1e---ditokelotadowasibum.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/a0c2e4bba7ddd482d97e8aba478c9388/71940631290.pdfIn PDF document text
    • https://latrinquette.com/upload/editor/file/vepugapitapinigilawizino.pdfIn PDF document text
    • http://ikhmongol.mn/ckfinder/userfiles/files/28412707078.pdfIn PDF document text
    • https://rosewoodcity.org/nbloom/fckuploads/file/44706691200.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f151ef11c---98417234726.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/808e39ebb421c9058e2dd88f0d264ac1/58725778678.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079b283ef1ff---limepipefinowewepupolo.pdfIn PDF document text
    • http://leinerpakgelatine.com/survey/userfiles/files/52484139753.pdfIn PDF document text
    • https://bettyloupaints.com/userfiles/files/37301605520.pdfIn PDF document text
    • http://taiyoaquris.cn/upload/userfiles/files/20210628065740.pdfIn PDF document text
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/b595c3f9d6fb1a6f24e5f5fbd0496d8c/17251321206.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/1fe0906833748bb2a6766f5db01e24e2/36118711736.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/disogifuba.pdfIn PDF document text
    • http://daiichihr.com/uploads/news_file/5585036096.pdfIn PDF document text
    • http://metallpress.ru/files/zimigafikuri.pdfIn PDF document text
    • https://bwawarszawa.pl/upload/file/wowivobowi.pdfIn PDF document text
    • https://nhadatonline24h.com/Images_upload/files/juromubevonuzaruvudef.pdfIn PDF document text
    • http://alessandrobelleseveterinario.eu/userfiles/files/9095445805.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/3b6cddd2f3025f065818643d2cd4af5a/vujutuvodigisenafolatijun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+change+file+to+pdf+on+laptopPDF 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_off0000e8e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E1 17892 bytes
SHA-256: cb95e21fee6534d4966e37c8631133ee7385ecafdbe1195eac87c68ec88cd454
font_01_sfnt_off00011858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11858 10708 bytes
SHA-256: 14e54de601727dc92fea1645231a74f3d70c8628e67c8cf25bb687d147088fd2
font_02_sfnt_off000130a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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