Malicious PDF — malware analysis report

Static analysis result for SHA-256 07d79de6a7885501…

MALICIOUS

PDF

85.5 KB Created: 2021-06-26 02:18:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: f4d5122834333d91acf6d31bfb464958 SHA-1: d620e3ec14e1583f17a8549d20d80ad448307e5c SHA-256: 07d79de6a78855012c63603fb7da8dc66319b654c73520e0dc3e995f509e73d7
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of links, many of which point to compromised CMS upload directories. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were explicitly extracted, the structure and URL patterns suggest it's designed to redirect users to potentially malicious content or phishing sites, possibly through embedded JavaScript or by exploiting PDF vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

Heuristics 5

  • 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://muzeumostrowiec.pl/obrazy/file/wojugaxifobosesojirozer.pdf In PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/7baf353d7cb41c954cb7018e4a09f8b5/28663921609.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/7cebdf75b472fd36c3b526df4e81fd79/18590963616.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608c46b9dd5c7---37903421361.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/50605682301.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/35511280375.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160b4579be1583---99114099369.pdfIn PDF document text
    • http://bukhatirhomes.com/userfiles/file/kenok.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1607cadd4ecb13---68754051204.pdfIn PDF document text
    • http://erdbau-rauch.at/86104116720.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088b605b7b35---14210258775.pdfIn PDF document text
    • https://arrayamed.com/userfiles/file/79297196355.pdfIn PDF document text
    • https://antae.be/app/webroot/uploads/file/31579776075.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607de19be7a71---98719962633.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/catdip3od7oasnogk70su0rnh5/bazezazofilani.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/mrbq8pjapmepi453vm4ul8b6fp/fujisiferiwuvijof.pdfIn PDF document text
    • http://grodgolf.com/clients/f/fd/fd83fa7079552abb47853a85229f74c1/File/xorubaripazurawapobon.pdfIn PDF document text
    • http://thehigh86.com/clients/13680/File/sizitotarixewuvudaliw.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/cd679940dd546fce2e99c733df2e9b95/98739533071.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/dbac1d2282654014a0a04e2b0d8ab362/52428985211.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16089f090d87cb---sudeg.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608b162ce8a56---xokakejokoko.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160bdfe1c8b8a2---11888490460.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c984cce7bdd---33052005612.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/rebalupotutoje.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160861ffa05292---linumatetewupejamaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=write+articles+sims+4PDF 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_off0000ed6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001057d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1057D 16916 bytes
SHA-256: f52cf68e5751f296aff96f658e16afe31363e5f4ba5b33e467a1b8ba0172b8ec
font_02_sfnt_off00013195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13195 10236 bytes
SHA-256: 2921d3b527a97b213be21ca32cba9a174fd5de29cf340c72a40913683cba2fcb

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