Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8b23dafaeac14ea…

MALICIOUS

PDF

91.9 KB Created: 2021-09-01 09:34:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6df4c4e0a718358ffd2105abc5fb6ebb SHA-1: ae96f08d343de8318d66c35d1aba558bc18fe37d SHA-256: d8b23dafaeac14eafe27498d3d6f966c31ba0901283b060d145b5d63fb89ffee
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing to multiple compromised WordPress upload directories and other disposable hosting sites, indicating a phishing or malware distribution attempt. ClamAV and ML classifiers also flagged this PDF as malicious. The primary attack pattern involves luring users to malicious links hosted on compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 http://piau-po21inn.com/CKEdit/upload/files/5911759960.pdf In PDF document text
    • http://tingchucontrol.com/Uploadfiles/files/58628929993.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aff1848e163---96289781866.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/fojevokijuref.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/seliwobidevunagiladuj.pdfIn PDF document text
    • http://hungbuloon.com/media/ftp/file/95691663164.pdfIn PDF document text
    • http://haphadoor.com/upload/files/laseb.pdfIn PDF document text
    • http://brilspa.ro/userfiles/file///29550101949.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/23102b1b39009439bedfc36a9b4c5b9a/35331106764.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/41833677354.pdfIn PDF document text
    • https://bhandarisurgical.com/ckfinder/userfiles/files/18697167597.pdfIn PDF document text
    • http://mail-ex.net/userfiles/file/93478645934.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609973182a429---tarenavat.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/wejagiziv.pdfIn PDF document text
    • http://thuephotocopytaihanoi.com/upload/files/rixovufomozisesurevawuve.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086b389b3158---39174644380.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/5fcd508e2ac76590d495858bf979d84d/11169871029.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbffe7d66dc---fofimokawovoz.pdfIn PDF document text
    • http://cancunday.com/travela/img/files/75393262102.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076ab743a93c---80579290928.pdfIn PDF document text
    • http://suamanhinhlcd.net/userfiles/file/29259343831.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b9ef480668b8bfad41db4a8eff360e42/depokirutanisate.pdfIn PDF document text
    • http://screen.by/images/file/lafeloxak.pdfIn PDF document text
    • http://cocoal.com/uploads/file/60586689118.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=star+crossed+meaningPDF 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_off000104e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E1 17468 bytes
SHA-256: c78f1affe06b96f11500cbb27808863009db3ccd5cdb54bc8359935cf967765f
font_01_sfnt_off0001317d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1317D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14994 10740 bytes
SHA-256: c860f202490b53610499dad5052233ecda3b689f7636515f47ebd07a3bb96ab7

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