Malicious PDF — malware analysis report

Static analysis result for SHA-256 064cdab304a34d89…

MALICIOUS

PDF

158.1 KB Created: 2021-07-22 21:32:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 417b732263a57e911c4883807c7a644b SHA-1: f4e08bbffb1542165bcd1ce38b13cd3ef49a7f0c SHA-256: 064cdab304a34d8994b85321f7d7c0746cd3fdc0eb3807ec89acb2d3f47cbac9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites that host further PDF files. These links likely serve to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d003c02ab1---4279646449.pdf In PDF document text
    • http://nutricion-intravenosa.com/wp-content/plugins/super-forms/uploads/php/files/5919d87a2372992085b36942ccbd47d7/83657700632.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/4513256285bb1ebb2a0cd26ecaf5d527/jibaxiviragezevenafa.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/f6cad065b884fbe09797f973bfc4e291/16539546364.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609dfcfcb09af---72642502868.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/d5ba27009866940bb70028c712b27c90/wurokov.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/f89c09a2ac1c4ab6527b3663a525d76d/gexakepibezug.pdfIn PDF document text
    • http://carefirstwalkathon.com/clients/8/89/89514deb4c0e8807eb046cac28c4977f/File/tumun.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/potaneli.pdfIn PDF document text
    • http://w-f-l.de/user_img/file/72223745154.pdfIn PDF document text
    • https://liantoong.com/archive/upload/files/duresagiwisejolepokotoba.pdfIn PDF document text
    • http://tablica-nieruchomosci.pl/uploades/fckeditorfile/fetibawiku.pdfIn PDF document text
    • https://celebicatering.com/upload/ckfinder/files/kuleruzekal.pdfIn PDF document text
    • http://31kouqiang.com/userfiles/file/1622646973.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/cc0a5382846a1b5e1ca76343b27726f6/pumivenezigikisagedu.pdfIn PDF document text
    • https://autotronics.vn/userfiles/file/zerup.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/84344d252049a8689d2921add6e39663/wofutuse.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/84129632386.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-5-13/20210513174436101296.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160ae8885182e8---1701482693.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/3nshvbdk1njbaok3knvig5bn8d/23339551433.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/8b80f864accec1ecc78575893e99545a/peluwipifavizugorenuso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=what+does+the+bible+say+about+depriving+your+spousePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000220b4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x220B4 16588 bytes
SHA-256: e29aa5b351a861bfd72916bef7c69fce669816212253082eefa0c28bf63a0937
font_00_sfnt_off0001e605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E605 22964 bytes
SHA-256: c3e8ed4b47c57fad89cfa8ba7f0604c20e75156427a30e2b7d7846a281d8b1b8
font_02_sfnt_off000237eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x237EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00025002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25002 11084 bytes
SHA-256: ea6ea358b414ea872068933a268c89f894f4d59a9f076ee6448a8a63c1d998b5

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