Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e5bf4511ef97a92…

MALICIOUS

PDF

88.2 KB Created: 2021-07-03 03:23:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: dc31d7f039ab8141d02d81c84dee1c4a SHA-1: 932ec97134c8844a04ec23bcb44d7268e5df5576 SHA-256: 2e5bf4511ef97a9283c1ae95487b77a0622ba730c5b676f8ff63b2432cca509b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, directing users to numerous compromised websites and disposable hosting domains, likely for phishing or malware distribution. The document body is heavily obfuscated and contains no readable content, but the presence of external URIs and link farm heuristics strongly suggests a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://nomylo.ru/uplcv?utm_term=mcl+ligament+pain PDF link annotation
    • http://chukgoobok.com/files/fckeditor/file/82731756586.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/83597911466.pdfIn PDF document text
    • https://www.rekalibracija.com/wp-content/plugins/super-forms/uploads/php/files/02b053f0b15d30d1994fb574d49d2469/23111649380.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac975dea802---75108929078.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/c4d6b409644385f28f6fd38a989b9d55/dawexuvataxipewapedel.pdfIn PDF document text
    • https://transport-vehicules.fr/userfiles/file/77225134336.pdfIn PDF document text
    • http://moestuinwebshop.nl/userfiles/file/jafanudazeb.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/2fc7119a0aadfb3a09b518f6c55467c1/dibinijoxelulolisamu.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/famikoxovokuxiz.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/8a6a9f3e2f75d8b5fcf796d8f083a359/koxutenogetita.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/gvi97fusuhth8gi789qb35a9t7/94045672020.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/b37d4f16659ca33c909e91678ebc29e2/ratugu.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f02fc4987b---faganafejifitulif.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/balivinutixugotorita.pdfIn PDF document text
    • http://amctop.com/board_data/editor_img/file/202105110628.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/7di29m5n7tmul6rq3d383qb9u7/9547589871.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/wapajis.pdfIn PDF document text
    • http://sungsam.net/userData/board/file/mavalebetafeponitusivat.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad4a0f87838---80889808410.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/pifamamepow.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/3o8l39uds09p4knqq408u0sss4/72820114682.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/regipugimonijidame.pdfIn PDF document text
    • http://drivingschool-brno.eu/files/86895903639.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/0puailk4giqavg3cv53gtk4gge/92829815717.pdfIn PDF document text
    • https://np21bellapalermoshopping.it/file/motopivuwakudipodar.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_off0000f8d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000110e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E7 10320 bytes
SHA-256: 7d56c0d2cc77d45b6ad4f4d19a75fabc35a096f37996198e5b9fb90a9b55d2d8
font_02_sfnt_off00012827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12827 16756 bytes
SHA-256: 2fa18513d49a32b5ea31a18bca4afe654db1178c5c297ea8ae0e620d47a6ee1c

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