Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd3f54dd5a002c17…

MALICIOUS

PDF

133.1 KB Created: 2021-07-05 13:11:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: fe9b48e093d29f63c6b96016129be1e0 SHA-1: 9703333569638ef4dbb4842ece2686899fb66378 SHA-256: dd3f54dd5a002c1794e5f63a76680cdd33feb817c0f6789cb5ecb950479f43aa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to external resources, some of which are hosted on compromised CMS uploads. The primary attack pattern involves luring users to click on these links, potentially leading to further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9520

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://warsztatgdynia.pl/app/webroot/media/files/6084992781.pdf In PDF document text
    • http://watdoenwevandaag.nl/upload/55094964553.pdfIn PDF document text
    • http://naucseto.cz/storage/50846099969.pdfIn PDF document text
    • http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/79582552505.pdfIn PDF document text
    • http://gpmpoolandspa.com/ckfinder/userfiles/files/75653983253.pdfIn PDF document text
    • https://prestinireedcorp.com/userfiles/files/refowejopava.pdfIn PDF document text
    • http://rowanfamilyreunion.com/clients/28915/File/kezujanikinujasewata.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/c7fc41250b812b5d12388f104dbd13f4/talovixawugodugaze.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b41565b74---65021247885.pdfIn PDF document text
    • http://geodez.com/pliki/file/27884562034.pdfIn PDF document text
    • http://ip-golubev.ru/ckfinder/userfiles/files/45303963683.pdfIn PDF document text
    • https://terlickodds.cz/www/www/fckphotos/file/74849485525.pdfIn PDF document text
    • https://paperland.bg/uploads/file/penoxonux.pdfIn PDF document text
    • http://riversedgefm.com/files/file/livizakaxibedediza.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085fd4696351---nutikamekidugenolozaz.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/f03385629a5988b875d8972ff053565a/4832894138.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607246bd87d1a---56213966326.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/839cfb48617cdaccfc7a43bb10302498/15452212609.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/5f587ba231f4b60a5ea6c4fdf561faad/42362170742.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/rovakonubezoguvinikul.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/kotavobanizevo.pdfIn PDF document text
    • http://alexanderjamesbackcatalogue.com/userfiles/file/26356975016.pdfIn PDF document text
    • https://principesgs.com/userfiles/file/lipaju.pdfIn PDF document text
    • https://machnhaduong.com/images/uploads/files/waziv.pdfIn PDF document text
    • https://schilderlesvakantie.nl/ckfinder/userfiles/files/77081727954.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=rig+veda+indraPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17644 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00018e56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18E56 23392 bytes
SHA-256: 79fc050f623bbacbd6ab818607168157def5a114147f7b3e2a2e1e52bc3f4845
font_02_sfnt_off0001c744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C744 17004 bytes
SHA-256: 1e627b9ce6d1e793db99877213f659cf60e8ba0fddd8709746cdba3f71f9dfd5
font_03_sfnt_off0001e015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E015 3920 bytes
SHA-256: 1317016c31a311dee941d65e0d19bd8a236b52625e2a194ab871f1d0ca7f8ae0
font_04_sfnt_off0001ee9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EE9B 10100 bytes
SHA-256: bb94279d2f3490ec3d66bd36f0adb981dfb2e67739d73a84bf26629fc406dd10

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