Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce15af48fa3472b0…

MALICIOUS

PDF

72.8 KB Created: 2021-09-07 13:45:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 232056a9a900d35d9c50b1206ff72b92 SHA-1: b2af1cea68fe8eac33600c6549b6d15c3637568e SHA-256: ce15af48fa3472b061bb18eeeeda8331bc0eb6d462c5643be93085612d9ddc5c
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and disposable domains, suggesting a phishing or malware distribution scheme. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/ddedfc4f857d932bbf6f99cce3947d25/23501037641.pdf In PDF document text
    • http://karmand24.ir/basefile/ehotel724ir/files/34010293024.pdfIn PDF document text
    • http://quiltingacademy.info/fckeditor/userfiles/file/vamalala.pdfIn PDF document text
    • http://maygiaphat.com/upload/files/2813896820.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d74e3db86ba---komorikarijunipibiruwoxip.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/34gc7o2dareq7bim634td3oo86/tabifavegamigegizuduw.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/13df8162e02e51137bef0db269dbb645/77626643933.pdfIn PDF document text
    • http://voszveszprem.hu/_user/file/guwumugakabalireropifojam.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c465d22a2ee---worupewetudu.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984ab3df939---wuwolivofotefivasema.pdfIn PDF document text
    • http://banquat.com/userfiles/files/rajumobuxijezukunekizim.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-5-16/20210516094846297419.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/kepaferemujawofunovadila.pdfIn PDF document text
    • http://jedwines.com/cmsCart//upload/file/sanibirofegorisexub.pdfIn PDF document text
    • http://patp1ryb.ru/media/file/52718040250.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/3a45e5e06d00e03655e64fef0c460b0e/94318720683.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/13l344e0ua1mc2uhr2vi9vrbp4/11681714392.pdfIn PDF document text
    • https://hotelmitrutarija.com/uploaded/files/ninufixitasulalaveje.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/hp1scackt7n7aaidp3pf1ulqj0/paxuwamekejabifemuvaweki.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/75061503381.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16071c91d8a88f---41746475867.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16087dfcd542bd---7298530319.pdfIn PDF document text
    • http://yidaig.com/uploadfile/file/20210819162126.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=o%26m+manual+companies+ukPDF 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_off0000b51b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB51B 9100 bytes
SHA-256: 304b2f4f3f07c51f5322cd760e1c068b825523d2656aaa7e16a75f442d20acc2
font_01_sfnt_off0000c7e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000dff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF5 21028 bytes
SHA-256: a6a711fccde08639e5f6f2206f53b9ea465b84a4549ae5a407943974e309a44c

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