Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e2f8b7310f16af7…

MALICIOUS

PDF

74.3 KB Created: 2021-09-06 06:08:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2a9fea07f1711f05c87c5e0a820527db SHA-1: ef63864d5380c1b5253665b73c515003274d2439 SHA-256: 8e2f8b7310f16af7caede3ef33a1ed5a5aca4a6b854a798a3740108f0280303b
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution intent. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites and other disposable hosting, likely to redirect users to malicious payloads or phishing pages. The document body is heavily obfuscated and contains no readable content, reinforcing the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d800309bc---rotupolitagubotek.pdf In PDF document text
    • http://www.feniuniversity.edu.bd/app/webroot/ckfinder/userfiles/files/46013103593.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba4445665b9---rasowevunenozelojisorikik.pdfIn PDF document text
    • http://www.autoservis-hubatka.cz/admin/upload/ww/file/gexiwepuj.pdfIn PDF document text
    • https://unosms.us/userfiles/file/46255215706.pdfIn PDF document text
    • http://tdbakademi.org/userfiles/files/pokewedaxuze.pdfIn PDF document text
    • http://angel-conference.org/upload_fck/file/2021-8-7/20210807121221691553.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/74f2bff4be55b77c71026ad67809d6cd/50218514846.pdfIn PDF document text
    • http://scmsalliance.com/clients/864514/File/wifuxezuvomibafa.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/eeabc5fa18d19e60d21043128f714886/13916449070.pdfIn PDF document text
    • http://duda-tech.pl/dudatech/upload/file/86792470917.pdfIn PDF document text
    • http://e-sheremet.com/img/54477825565.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16079ddf23c703---modamoririwimojada.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/kfltg1s7pn4e4ene4mvneocv51/nuwof.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160d5203ebf21a---datadazutorube.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/52301774652.pdfIn PDF document text
    • https://noursportevents.com/wheelmarine/userfiles/file/96672438398.pdfIn PDF document text
    • http://kasaitogo.com/uploads/files/88812699390.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074fdbbd8a26---lesewidapupeduvus.pdfIn PDF document text
    • http://mingzhicc.com/userfiles/files/23205885612.pdfIn PDF document text
    • https://nhadatonline24h.com/Images_upload/files/43260341781.pdfIn PDF document text
    • https://www.gurgy.net/ckfinder/userfiles/files/28242357420.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d489dac67c---55369207886.pdfIn PDF document text
    • http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/14884735549.pdfIn PDF document text
    • http://mdc.ir/ckfinder/userfiles/files/sisave.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=arguedas+agua+pdfPDF 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_off0000bee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEE4 10296 bytes
SHA-256: 2d25c2be7fedc2a3d0429b5f5bcb01c885fa1c61fa349963fc4f4c8856bc6424
font_01_sfnt_off0000d5fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FA 17900 bytes
SHA-256: 92355128cf8087c23a9e2c9594ef67595e02e895862e681297b5521e369063e2
font_02_sfnt_off0001037b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1037B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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