Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a2879bfe8e73cf5…

MALICIOUS

PDF

82.3 KB Created: 2021-09-02 08:05:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0b920f252b88d32cbd23f43a5b00db45 SHA-1: 85772f09e04b0f518cc89d48310f523c0cafc002 SHA-256: 2a2879bfe8e73cf57753e961f892959c5faa925e3d65e110d1361b0a3674683f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded URLs that point to compromised WordPress upload directories and other disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be directing users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

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://philabc.ru/uplcv?utm_term=ifdef+c%2B%2B+example PDF link annotation
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c12e2501b16---zanowaladazidodikoz.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160fb2a886565a---23692523867.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/9917828342.pdfIn PDF document text
    • http://jfkanacon.org/data/userfiles/files/61686259651.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbd5b43b79f---sepivawetabedisotalap.pdfIn PDF document text
    • http://recit-de-vie.fr/userfiles/file/92102389578.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cf980c1ccb---fixube.pdfIn PDF document text
    • http://aivieksteslaivas.lv/userfiles/file/10434227871.pdfIn PDF document text
    • http://bentleyplemtech.ru/userfiles/file/suvasapinenifivewudez.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/wejunefawamarujufo.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/27935898222.pdfIn PDF document text
    • http://chamdure.com/DATA/files/suvudedesuvijifawutemirex.pdfIn PDF document text
    • http://beta-rc.com/upload/files/92701470644.pdfIn PDF document text
    • http://swaminarayangm.org/userfiles/file/gumuzojizupiwojib.pdfIn PDF document text
    • https://medicentrumnz.eu/medicentrum/files/file/97727927716.pdfIn PDF document text
    • http://sammyurias.com/userfiles/files/87416509286.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/beribafidawaleke.pdfIn PDF document text
    • https://electrabicycles.pl/app/webroot/uploads/file/162122501521.pdfIn PDF document text
    • http://954move.com/clients/4890/File/jeworamajoluba.pdfIn PDF document text
    • https://fulzugaskozpont.hu/files/65630738158.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16078f47d1fa08---39479613722.pdfIn PDF document text
    • https://gertiesbloomers.com/kousumi/nulook/upload/fckimages/file/7362691085.pdfIn PDF document text
    • https://cleaner.pl/userfiles/file/nuxixolupazat.pdfIn PDF document text
    • http://nissanotogovap.com/uploads/images/files/zumelosa.pdfIn PDF document text
    • http://kameleonhastanc.hu/files/file/65375447256.pdfIn PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/joluvubimesijexosobox.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_off0000dad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD6 10152 bytes
SHA-256: 55cd60805aa8091fce2d7cd9e92b6433f3ee266d71ad49e043071226bf1e4f50
font_01_sfnt_off0000f18a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001099c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1099C 18348 bytes
SHA-256: 86fc92008b99dd9a9409a7e19714010db38fad40f4bce769071446ed39c1e6a3

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