Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3af62c3021727c9…

MALICIOUS

PDF

85.2 KB Created: 2021-07-08 17:05:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 8aeb49a60b9c024f4f1d0bec02551efa SHA-1: d0b9009b299b2637a625e8d684adf44d39cfd46e SHA-256: e3af62c3021727c9d5b5954a0b7ac9acda7d023b3e2c4259927f1f4fe273492e
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm and a potential phishing or malware distribution vector. It contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, suggesting an attempt to redirect users to malicious content. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://ldbell1965.net/clients/85689/File/zojelit.pdf In PDF document text
    • http://moyamoya.center/images/hand_uploaded/files/61397465721.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1acef96029---jimevegurununolebik.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/210rqube4meb4jo9aj08d4pnnh/97090503558.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/596eb3c07b7536337929c5198f228bb9/95301837445.pdfIn PDF document text
    • https://apsco.ly/userfiles/files/fujuxogafijezipugodebi.pdfIn PDF document text
    • http://kasintorn.com/images/upload/files/90377208640.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/16085206466f80---21001741196.pdfIn PDF document text
    • https://ahreco.com/uploads/news_file/55069729350.pdfIn PDF document text
    • http://asustainable.com/global/file/jekudeduruxusomuxexujav.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c5b0aba75---zumisuzufa.pdfIn PDF document text
    • https://theatresaucinema.fr/uploads/file/63559022990.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609f27d2a7bab---pulab.pdfIn PDF document text
    • https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/82fri33u573q2c21h6t158qj4t/53794459074.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c3bc814c245---zukefotilokubem.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/410419d5380514fd5b48d25d21a27623/161683896.pdfIn PDF document text
    • http://probeg2000.ru/files/userfiles/files/90051945213.pdfIn PDF document text
    • https://dailyiat.com/html_upload/file/livinubesofa.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc145acc19---xalegi.pdfIn PDF document text
    • http://cepsagibyachtfuels.com/images/photos/8658673995.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/16099935d7f857---vuniwubujikibaroxugefufen.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/36163265809.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b180410ea0a---tinonalajofuwum.pdfIn PDF document text
    • https://rabudiagnostic.com/userfiles/files/sofarukiletiwig.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7db29ff13---tikuruloruse.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=transferrin+low+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_off0000eafe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10315 10508 bytes
SHA-256: 004a02d09ebd32b2386dd828740788973dc8d0d2f4b8606758edd139fa06db89
font_02_sfnt_off00011b05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B05 17216 bytes
SHA-256: 8e912a0ecf3f0e2d5768eafe4eb45feb3a65b7f26a95e2d3bb52d4c068b80fdb