Malicious PDF — malware analysis report

Static analysis result for SHA-256 701c6f85b23b8ae2…

MALICIOUS

PDF

112.8 KB Created: 2021-07-22 17:22:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: ca0648256551679f6cc4917fd97c75bd SHA-1: 2a1f56d735e5ce6a95bde1498a05f196c16c4a5b SHA-256: 701c6f85b23b8ae20a1747f07d34f4bdabd527c4add897dc3b36e62202a678de
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document functions as a link farm, containing numerous URLs pointing to compromised websites, likely intended to lure users into downloading further malware or submitting sensitive information. The presence of multiple distinct hosts and the use of disposable hosting reinforce its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/8oeq02h9p0ahqb5ct5gged3rjs/zetomiwidepona.pdf In PDF document text
    • http://alemotta.com/resources/original/file/32493511404.pdfIn PDF document text
    • http://royalwedding.jp/images/blog//file/98438425454.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/rg3ovdd381cmccti5gloadg0r0/80677763186.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/59134161041.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072abb8354a4---95257047619.pdfIn PDF document text
    • https://aydin-elektrik.com/resimler/files/82255030705.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/79bf1a92c78922984618cca3d92c3017/63057610421.pdfIn PDF document text
    • http://ytbozhuo.com/upload/file/230536129464.pdfIn PDF document text
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffa4009922---nojipuka.pdfIn PDF document text
    • https://locktactyuma.com/ckfinder/userfiles/files/tumizalazaximev.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/p9d3lkhejfsr1193gt2jl3sjno/rozixem.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/fc46d613d2e0a5662a24d25ed1910b14/67178541134.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a4874c03b---34210773760.pdfIn PDF document text
    • http://geyikkimya.com/userfiles/upload/file/kupukaxededorarutekep.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5c19913009---60503775150.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a635954ee1c---logiwakotarufu.pdfIn PDF document text
    • https://weddingitaly.jp/images/file/suwidenerudumo.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1609af2b2a6050---xekekelazebizibeziwafoz.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9c4eb47fa---rubigetugu.pdfIn PDF document text
    • https://divinesacredshakti.com/wp-content/plugins/super-forms/uploads/php/files/c2b1a3382d824c85d32e1005dceaba7c/891575646.pdfIn PDF document text
    • https://dialogueinpraxis.net/files/docs/vozatebafiwezimituko.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/0b58492117216fd73e4d631df8c18398/76458064913.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/16085cef60b425---44983235995.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/e5ee95d9am0ugbrmgpdue1bpou/3896552229.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=winter+from+rwbyPDF 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_off00015501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15501 19052 bytes
SHA-256: d3db0796596918240f0f29af91bb9120f67ae2bbfe27034c823175d93e1ceebf
font_01_sfnt_off0001860b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1860B 10332 bytes
SHA-256: 16f2c3ad595de7c678e4b609ea11b5c7ade402041c937c8e64aa5bbc62e059b3
font_02_sfnt_off00019d69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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