Malicious PDF — malware analysis report

Static analysis result for SHA-256 1baf46076bbdb503…

MALICIOUS

PDF

85.0 KB Created: 2021-07-19 00:23:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 33e15bc709f5565ffd9d2476950a9f16 SHA-1: 508ca06e9bfb6d6e51d331d28495a75458470ab0 SHA-256: 1baf46076bbdb503a8a2758e15d2f04ca69de70ec6d90e40e3851a46fb41777e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as containing a link farm, with many URLs pointing to potentially compromised WordPress sites. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. Although no executable scripts were found, the structure and numerous external links suggest an intent to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606d24ebb6d1c---nuzexojusuvumegedud.pdf In PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/qthhgb4caqr945dpif9gimfr31/juwasokeseneminepul.pdfIn PDF document text
    • https://educhina.mn/editor/files/raruvepuxeveritenevodixut.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607848d134de5---lakixaxizutukaxedoz.pdfIn PDF document text
    • http://reunionclass.com/clients/7469/File/vijib.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/68556208357.pdfIn PDF document text
    • http://cycling-software.com/files/file/biwen.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/ke70877km90kanp8565a14ecbi/89936530684.pdfIn PDF document text
    • https://invest.pl/userfiles/file/26416239703.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/bj1q2ec99cqfh99ij3avnpgq10/34040854418.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/4c571754bc8906ff08ec177851514671/68224363126.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/vibajoxeja.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/9630646970.pdfIn PDF document text
    • http://crackershrimp.com/file_media/file_image/file/dedogefokibap.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbba02d46a---6885802183.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/a68596a1499ba7052ed755bb2f78bbcc/96123047383.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/2ccba7b63a153d9057bbda1bea060d76/24565131557.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce36bbea04a---52877382315.pdfIn PDF document text
    • http://vejwun.cz/images/gonilesokij.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f498e4d2ed0---gaxovageg.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/69bd9aqnsdu043o9ut53265ln4/nisimufibebakasuvim.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef75b85f3d---81938135426.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/24007717674.pdfIn PDF document text
    • http://myphamlulanjina.com/upload/files/zupapezu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=spider+in+ctPDF 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_off0000ec74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC74 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10486 16816 bytes
SHA-256: b829e35db5133e79a827d97943d7bc51ae810ea5aa3f7b081d31ce42e6f0bc83
font_02_sfnt_off00013059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13059 10084 bytes
SHA-256: 2c56ef61340b231da2411f066e89b7f137259496fd2e42df89234209dcaa4114

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