Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cf097bcf42f857d…

MALICIOUS

PDF

88.2 KB Created: 2021-07-12 17:04:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: f082661131737adfb7f971fed5563485 SHA-1: cf578c21040a1124abd19660f21f1b3bb8c9fb52 SHA-256: 0cf097bcf42f857ddf8cf3254e2e4140b849f67c1c1755817cc99f0ffabd4a24
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS uploads. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and URL targeting suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9899

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://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b610f3c71db---gixajotekumugetita.pdf In PDF document text
    • https://giga-tronics.com/userfiles/files/24418669775.pdfIn PDF document text
    • https://promise-land.com/upload/file/votiduwi.pdfIn PDF document text
    • http://italianopizzeria-pg.com/uploads/files/67254839324.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/c5dead2fc2de996fef0e26bb252d2aaf/27204472673.pdfIn PDF document text
    • https://aplusadvance.com/naver_editor/data/file/mevalipajusonafonamiwafun.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/xesixivolemidunozunurilem.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/st0m3sjdmpgtes0bs95vdfoucn/jipujene.pdfIn PDF document text
    • https://oriental-kitchens.com/userfiles/files/vafewiwa.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/9236b7c1137a4493490901d350177896/luvafegoloxazabidadufo.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/a1cd3744fe9977194b409ec7fb49d0cc/58465042422.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c4639f6ac75---10853763052.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/uef8hmasum44g1gqbvb8r6qtjc/juzobuvasokag.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/d8a5d60cf350f381f4789e7cd729e091/fobanojodijimewam.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/3fee1a41684973163bf3d63de3514865/31204097888.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/7096056406.pdfIn PDF document text
    • https://kaxtongroup.com/home5/maxconne/public_html/kaxtongroup/assets/images/newspostimages/files/44067244088.pdfIn PDF document text
    • https://taevlingar.se/images/pages/file/3725286491.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160828f88c7c8f---gogizosijop.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607eac01c4663---najoderaj.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/uhptplvmff661op6nrcvuqgtck/32382153362.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/d37617a1c8281cf9b810471e88b5d36b/51334140349.pdfIn PDF document text
    • https://mayurherbal.com/userfiles/file/23050310393.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c75738802f5---58498713858.pdfIn PDF document text
    • http://www.pzkexie.com/up_files/file/83994170336.pdfIn PDF document text
    • http://koszyczarek.pl/userfiles/file/talogopevonunebupuvef.pdfIn PDF document text
    • http://badaranquehablar.com/userfiles/files/wopalidokupuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=beauty+is+in+the+eye+of+the+beholder+shakespearePDF 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_off0000f5be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010dd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD0 16812 bytes
SHA-256: daea8a027a0df0572d8194b3b861fb77ed27f487b40d085053e1a1468434f333
font_02_sfnt_off0001394a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1394A 11096 bytes
SHA-256: afe50b663f4655dc5908de2ef9b1e93e0c33fb61628904251226f639bf8fec8f