Malicious PDF — malware analysis report

Static analysis result for SHA-256 8deec79301cb13a2…

MALICIOUS

PDF

83.8 KB Created: 2021-08-23 11:37:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5a3f0f3560001a17d4ef082bb6d0cce9 SHA-1: bb9ddac17c9c53c60c6c7cdf211ae46594b75c29 SHA-256: 8deec79301cb13a26a7468ac608a94577bfaf83e3d210752b7beed597645bb89
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier, indicating malicious intent. It contains numerous embedded URLs pointing to compromised websites and disposable hosting, suggesting it functions as a link farm to distribute further malicious content or phish for information. The presence of external URI heuristics and link farm indicators strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://oniceh.ru/uplcv?utm_term=neil+young+heart+of+gold+lyrics PDF link annotation
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/f430c04064c3461e77f0192a7964e100/sasivaxokosawalizip.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160865fe3c5a6f---mubejujew.pdfIn PDF document text
    • https://bonekarusa.com/contents//files/lobakolekotufereget.pdfIn PDF document text
    • https://0800-707-808.com/upload/ckfinder_temp/files/20210801115316.pdfIn PDF document text
    • http://uspeh-kursk.ru/ckfinder/userfiles/files/14578206693.pdfIn PDF document text
    • http://latexindia.com/userfiles/file/varuzimi.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c13c06a3d66---69567630680.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074b8264148a---52482287014.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/47974155384.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/32004523830.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/099b6b3afd1235e72da61c448a7800c4/reteloliv.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609e088727ecb---34406877847.pdfIn PDF document text
    • https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/noxemisetetavaxa.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/8858fa1f01af27813d82e33095eea8cc/tibitivulesax.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/8e8502701e3d4722a1dd277a4356362b/joxefinulugixi.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/e29202387c1a71801564fcb45f1e2011/lovekamupalujo.pdfIn PDF document text
    • https://etadelloro.it/images/file/minuzaviretuzajozemiwu.pdfIn PDF document text
    • https://ubranni.com/uploader/files/6498482806.pdfIn PDF document text
    • https://foodvellythailand.com/upload/files/pujimasojixepixizoxiz.pdfIn PDF document text
    • https://kleinimmobiliere.lu/userfiles/files/69436824512.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f4309e03324---kotujeniruxijumewot.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/24ff2dcc6a55546b678ed8eb99e32e90/46468727765.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c98fb431549---26225091524.pdfIn PDF document text
    • http://hhsbluebirds1967.com/clients/b/b5/b592d679e9980e62d9d56be1bfb8b6b6/File/wugixupoxasar.pdfIn PDF document text
    • 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_off0000e0e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E0 17884 bytes
SHA-256: 534a707cd3cbf64e2a4b772e593f59e8fcd3e065070284b799e122b738e29401
font_01_sfnt_off00010f97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000127ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127AE 10944 bytes
SHA-256: a9873e05e49561777d50b7591a148ddeba48f423bf2fbb1f1c3a94d1a6b23150

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