Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3aed4995ec1ba9a…

MALICIOUS

PDF

73.2 KB Created: 2021-06-25 03:32:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c6ff4de062b4d5b5f604b3d724703259 SHA-1: a8d5e9223e95b473625951f7362cc711b0d8ca5d SHA-256: a3aed4995ec1ba9af5cdbc6d2f5d45e313778a7bb4514d47f2d00940790f17ad
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The presence of ClamAV detection and ML classification strongly suggests malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/0ab45a65d82ee4d33d3d69683746ca25/43316307309.pdf In PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/d5b6e72ef03c66d7c3ad0a0247a2e90b/35985709114.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/oxit.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/fa6f89b98438e8723aa3035abf61a246/muniji.pdfIn PDF document text
    • https://ietc-oman.com/userfiles/files/80788181950.pdfIn PDF document text
    • http://asokmontridental.com/userfiles/file/tawosomuvupifodaz.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/n2ae4s2d1icfd1i1ukica9ecs3/54528474567.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160be17ede7713---zugujewu.pdfIn PDF document text
    • http://c-amc.com/upload/files/25120994920.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c689e518e66---52048178467.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a04a5b4158f---14784720409.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608582fed2191---jonupepesijixafudeduvavib.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d0a78e029---5455218840.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=oms+order+management+system+malabarPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E5 5412 bytes
SHA-256: 7b893df3ef43a1e07680d95a504490f78b061790a5fd98a4a216fffed024f3c2
font_01_sfnt_off0000f330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF330 10748 bytes
SHA-256: a65dd5f36d18a60fe97a2d9edf4e976d0786e43a135a4fae821384525e97098c

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