Malicious PDF — malware analysis report

Static analysis result for SHA-256 783fcedf7110de6c…

MALICIOUS

PDF

73.7 KB Created: 2021-06-10 08:10:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 57080382192b66edb285b7f8678df68b SHA-1: cfa67fb38571c659c5678996f26df43fdd117fe7 SHA-256: 783fcedf7110de6c7b977aa4d3a0815f0f06fbe3c1e20ee3d085fbb40efff237
194 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing or malware distribution scheme, leveraging a link farm to redirect users to external resources. The presence of numerous Weebly-hosted PDF links, combined with a critical ClamAV detection for 'Pdf.Phishing.Trojan', strongly indicates malicious intent. The document's structure and embedded URLs suggest it is designed to trick users into downloading further malicious content, likely through a spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://medvor.ru/pbw?utm_term=fractions+on+a+number+line+worksheet+3rd+grade+pdf PDF link annotation
    • https://tivuwamivubi.weebly.com/uploads/1/3/5/3/135384825/vubuduj_pamudimu.pdfIn PDF document text
    • https://vizosajigu.weebly.com/uploads/1/3/1/3/131381839/e2193f52472.pdfIn PDF document text
    • https://vufomugivubi.weebly.com/uploads/1/3/5/3/135350936/a5c0a6115c0a081.pdfIn PDF document text
    • https://wamokanudetavud.weebly.com/uploads/1/3/4/5/134510572/dopefalivox.pdfIn PDF document text
    • https://dedotomonifagax.weebly.com/uploads/1/3/1/6/131606429/2c9d7a268bf21f.pdfIn PDF document text
    • https://bogexisamalalu.weebly.com/uploads/1/3/5/3/135320210/3b66958a4.pdfIn PDF document text
    • https://borusolu.weebly.com/uploads/1/3/4/3/134327960/sopiriwes.pdfIn PDF document text
    • https://jurulekoteg.weebly.com/uploads/1/3/4/7/134700509/5682273.pdfIn PDF document text
    • https://musejeruz.weebly.com/uploads/1/3/4/7/134740211/7443283.pdfIn PDF document text
    • https://befadileniralan.weebly.com/uploads/1/3/6/0/136082268/3529186.pdfIn PDF document text
    • https://vigenawora.weebly.com/uploads/1/3/4/4/134495248/dd762201.pdfIn PDF document text
    • https://zimuvudiredefux.weebly.com/uploads/1/3/2/7/132710782/8955102.pdfIn PDF document text
    • https://kozuliwibiji.weebly.com/uploads/1/3/4/7/134705154/dufuzurivebebisi.pdfIn PDF document text
    • https://faxemidarasagim.weebly.com/uploads/1/3/4/3/134341424/69b286b.pdfIn PDF document text
    • https://zipelademijup.weebly.com/uploads/1/3/4/0/134017001/kinurewagab_morujonerenu.pdfIn PDF document text
    • https://xixutusolorul.weebly.com/uploads/1/3/4/6/134685478/ad59008321860.pdfIn PDF document text
    • https://wopuwidutava.weebly.com/uploads/1/3/5/3/135322166/b3aba06f4b.pdfIn PDF document text
    • https://vumimexuderuwaz.weebly.com/uploads/1/3/1/8/131871863/xuvobutiwaraja-wudelosabad-sedukoj-vexojanifij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://poxanoralanu.pbworks.com/w/file/fetch/144422325/collapse_of_the_malolos_republic.pdfIn PDF document text
    • http://zabodovojif.pbworks.com/w/file/fetch/145015698/mozupuzo.pdfIn PDF document text
    • http://pazimonofe.pbworks.com/w/file/fetch/144461409/98100976728.pdfIn PDF document text
    • http://kufogokoges.pbworks.com/f/ukulele_tabs_songs_easy_fingerpicking.pdfIn PDF document text
    • http://pobonagul.pbworks.com/f/70035859485.pdfIn PDF document text
    • 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_off0000e032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE032 5984 bytes
SHA-256: 1d5bbfce2d41f56024b6cadb17953045cd411226d289378e5f9c7ce619828205
font_01_sfnt_off0000f47b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47B 10692 bytes
SHA-256: 76b24105d4cae1171d2597185bcdcac663068f08c7fba95ea062a6a937975b32

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