Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eea6bf78f112611…

MALICIOUS

PDF

96.1 KB Created: 2021-07-09 13:30:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8477220edbb22573c94c7886e2f532b1 SHA-1: e34475778e286af6dde5486c2c1a4c21737485c8 SHA-256: 9eea6bf78f112611cadcb13e5765158376e7fed3efa8bae809d488d8c6c4aa01
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations, suggesting a phishing or malware distribution attempt. The embedded links are likely intended to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a837ada580c---23855830690.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091081b78623---nipid.pdf
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8b37f4161---20510698690.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160734b72f068a---kamefo.pdf
    • https://smithsgame.com/calisma2/files/uploads/16158967723.pdf
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/ef26895cb8f02989d930365ffd76c3da/ferejifoxa.pdf
    • http://kibbkw.com/uploads/file/61043403804.pdf
    • http://trans-serwis.com/userfiles/file/fugugopewawimalula.pdf
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b27165fd27---nobujunesoweledo.pdf
    • http://biotop-zamosc.pl/userfiles/file/fumodifuwagusovateke.pdf
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/2218bf82c1b8b24f3787e60cdd5feb32/bawixipuvu.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/0555262edcca0833afe7589c60b3f42b/latopa.pdf
    • http://anhbanglaw.com/userfiles/file/gabupik.pdf
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16087cfac5fea0---77294099512.pdf
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0fe32b0fc6---11160499599.pdf
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/ba73ccb23de8e5749baf7e4f4cd618e2/29793606775.pdf
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609833924d93e---68767684837.pdf
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608548831f816---5495454014.pdf
    • http://www.yoko-ono.be/images/userfiles/file/57754221253.pdf
    • http://www.vikingmaterials.com/img/jafavumozudirevar.pdf
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9cdfb7f687---56936206906.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=animated+pictures+for+discord
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001172b.bin
206e1d9b2b0b70e8d4b3ebd12b490aea4e6e35797625117d55026f51dd794add
pdf-font-stream PDF embedded font (sfnt) at offset 0x1172B 10816 bytes
font_01_sfnt_off0001301a.bin
cd03d06806d6d9a91e2db315691b65b671e29c9739cbbb81571e60163a25dd7c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1301A 16696 bytes
font_02_sfnt_off00015b78.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15B78 16792 bytes