Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc7408e63316fab9…

MALICIOUS

PDF

100.2 KB Created: 2021-07-13 15:21:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1d84503fa487895d22c066335473daed SHA-1: f7094ccfe04d178bd34f422ce0290616e0c2ba29 SHA-256: cc7408e63316fab9c296955a059ad54284f2e9f4ef12ca697ff2832862142464
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to compromised CMS uploads, specifically WordPress instances, which is a common technique for hosting phishing pages or malware. The presence of numerous unknown URLs suggests a broad distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c443b1016ff---tividex.pdf In PDF document text
    • https://prawobrzeze.info/userfiles/file/rajazekizitimiraluzu.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/d10fdcffc5028b0709269bd730435105/76256706444.pdfIn PDF document text
    • http://vogiantinhmach.com/media/ftp/file/momisetax.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160999fee0a966---lironiwi.pdfIn PDF document text
    • http://abcbyspu.com/ckfinder/images_store/files/42444101224.pdfIn PDF document text
    • http://bannermaul.com/userData/board/file/7992201615.pdfIn PDF document text
    • http://come2menorca.com/images/file/gixulimumoworemuxos.pdfIn PDF document text
    • http://vhktn.at/images/content/files/muziv.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0143085001619900386.pdfIn PDF document text
    • http://simonide.org/userfiles/file/bagazedajomebuwoma.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/16094b5b9cc123---7748730050.pdfIn PDF document text
    • http://eltonltd.ru/sites/default/files/uploads/79224366154.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8a1543150---xarovatuxisifuvefemigawu.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c29bc689e8---jowozidumawipufaku.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609548a110300---zereremolaw.pdfIn PDF document text
    • http://loaamtran.vn/files/usersfiles/files/16771827189.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/vc96a8jsij748mvuji3qdaevr9/56087788973.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a500b946f3b---76398850052.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/m40fid7tuqfjeg5qfkmmihng92/gelolijolu.pdfIn PDF document text
    • http://domesticsolutionsagency.com/userfiles/file/82016083761.pdfIn PDF document text
    • http://studiorinaldibedin.eu/userfiles/files/vakakukinorotajanufu.pdfIn PDF document text
    • http://doks-films.com/pcms/content/file/52942047045.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=esdeath+from+akame+ga+killPDF 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_off00012849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12849 16532 bytes
SHA-256: 8b906d59e39acbb9b1c174be8b715ca38377ad91d2608f6871aa50c890b36d32
font_01_sfnt_off000152f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152F9 10772 bytes
SHA-256: 95369cafa8f0a6d413f9ade26eb32473d8031c83f35956a193191eed35d75d63
font_02_sfnt_off00016b8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B8F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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