Malicious PDF — malware analysis report

Static analysis result for SHA-256 9853b58c531707d0…

MALICIOUS

PDF

86.3 KB Created: 2021-06-25 23:14:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3bd03abd3ce2a5296efe465f1d1ef18e SHA-1: 17fb0deabb7e7f123bcf5f20d84afd402abb59f3 SHA-256: 9853b58c531707d069d80b29ba411605ad1081a6f804ff7c33384557dc699ca6
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised CMS upload directories. These links likely lead to further malicious content or phishing pages, aiming to deceive users into clicking them.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4019aa4e4---lidojigaf.pdf
    • https://dubigroup.com/admin/fckeditor/editor/filemanager/connectors/upload/file/jegixugasule.pdf
    • http://bannermaul.com/userData/board/file/55213647276.pdf
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/a64b2fd09370077f9b6d1addb9ea61cb/mepugunuvavegegomenuti.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba69f7dba44---ponomomuwanexe.pdf
    • http://rockpapersun.com/upload_mce_image/file/desuvasunarobadeva.pdf
    • http://a-swiss.com/upload/userfiles/file/5880455424.pdf
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/02ff8c9c2e00473905d632734912f8df/bopulobizapisij.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b9f44f2853c---29733516868.pdf
    • https://alarrabnews.com/images/content/content/file/fazakejefuvirosulomes.pdf
    • https://najlepsze-w-polsce.pl/uploads/17042087430.pdf
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607acac75601c---jasopakop.pdf
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/8264lfq1tjoennr95na4ckd6uq/lawiwibanibomoxikon.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/b28c15c1ca2d491a03428da0d4e5c2df/59380158281.pdf
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/13326579727.pdf
    • http://polimak.pl/userfiles/file/23388001854.pdf
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608116c030b2d---64900393747.pdf
    • http://bkdesign.ee/userfiles/file/lolopajakasidoseba.pdf
    • http://asea-admin.com/_userfiles/file/20210501105548.pdf
    • http://servmed.net/userfiles/file/70612282970.pdf
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609627aa5dec5---lipudosumexeli.pdf
    • http://angelojrobles.com/admin_initial_test/userfiles/file/depajinasagoro.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=calorie+calculator+breastfeeding+weight+loss
    • 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_off0000eb51.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB51 16792 bytes
font_01_sfnt_off00010368.bin
59fdc3f033fb844bdf9f3592d4f0794668e42a1b170dcefff47c6bc53a8379c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x10368 11112 bytes
font_02_sfnt_off00011d23.bin
3c74e4ac05ca2199f369169cbc54f9244a6ccdad8f552957ecfdc9c112c971f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D23 17164 bytes