Malicious PDF — malware analysis report

Static analysis result for SHA-256 e204e875f75a7637…

MALICIOUS

PDF

86.4 KB Created: 2021-09-22 11:09:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c9c1e477968fc1774f03b90d4185b82a SHA-1: 21b4b5b1ada395fed98e922ac0de00923125dee3 SHA-256: e204e875f75a76374786781a2e10a70b435bb9d028515681f888fc813389ac9b
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, including one pointing to a raw IP address, indicating a malicious intent to redirect the user. The heuristic firings for PDF_URI_IP_LITERAL and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM, along with the ClamAV detection, strongly suggest this PDF is part of a phishing or malware distribution campaign. The embedded JavaScript is likely used to facilitate the download or execution of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://kudusde.org/resimler/files/zuboruwajitozijosu.pdf In PDF document text
    • http://anchor-m.com/js/upload/files/54284882462.pdfIn PDF document text
    • http://caminodesantiagoenmoto.com/assets/ckfinder/core/connector/php/uploads/files/vamarafev.pdfIn PDF document text
    • http://yomamasushitogo.com/uploads/files/87128629261.pdfIn PDF document text
    • http://185.33.116.142/~bbyacht01/upload/files/vuzubetinumegozufomuxe.pdfPDF link annotation
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146dd55b397b---zumebekagel.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613228e9cd6a3---mipas.pdfIn PDF document text
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/14226401420.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149419b72212---96044070763.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021092214325573499.pdfIn PDF document text
    • http://kvrhousing.com/uploads/46287136673.pdfIn PDF document text
    • http://youngthisyear.com/ckfinder/userfiles/files/8184138556.pdfIn PDF document text
    • http://racecross.com/upload/edito_fckeditor/file/94615352217.pdfIn PDF document text
    • http://altiro.nl/home/tjerk/file/97111098573.pdfIn PDF document text
    • http://rainternacional.com/userfiles/file/nuropekiratub.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613e4b5700af3---12623602727.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/161304f9731c46---7475079647.pdfIn PDF document text
    • https://sportscientistsviews.ijmsir.com/ckfinder/userfiles/files/26532879426.pdfIn PDF document text
    • http://mbjarrahi.com/UploadedFiles/New/file/kefizepefuzoxizogawapibi.pdfIn PDF document text
    • http://altinay-law.com/images/file/fasoxu.pdfIn PDF document text
    • http://honeycontacts.com/uploades/userfiles/file/81329402244.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613929a517f9f---1945801624.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/93725923591.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=the+gettysburg+address+questions+and+answers+pdfPDF 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_off0000eae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000102fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102FB 17916 bytes
SHA-256: fb4739305523e0374aee424313fc15d6b00f24faba39caaff68bc2d53fa5499c
font_02_sfnt_off000131f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131F2 11280 bytes
SHA-256: f4875b58992a609500c45cb23c9f207da6a7da3744a71a74a1aa4fe7f159cefc