Malicious PDF — malware analysis report

Static analysis result for SHA-256 886cf900e82624d9…

MALICIOUS

PDF

94.4 KB Created: 2021-07-05 16:18:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a6c71141464e2c546f477fc064793f42 SHA-1: 984e753a906c81e301da3b75cf10318a38d09c78 SHA-256: 886cf900e82624d960fa1b20db91cfcfc0243e41bd74967470aa79500d68899e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded URLs suggest a tactic of redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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 https://drafthe.ru/uplcv?utm_term=is+20+mph+fast+for+a+human
    • https://xn--fct8ml6mwue.tw/uploads/files/68916520843.pdf
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f0b6e4e52f---15624494854.pdf
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160756ad5e2998---57636845816.pdf
    • http://tourister.kr/userfiles/file/51161712248.pdf
    • https://zoldlepes.hu/userfiles/file/vazelujabigixuni.pdf
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/musanonobuno.pdf
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/f941bf3a4f2b3f961c4288351672e289/wepimajamobidugejafuku.pdf
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/1321f0d4b999872de184517fa1a3c23b/86599299592.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/5cda4d931f692e81d89898a1dc808ddb/riwakito.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/2avv07je1mcn49uhhpgb10rr45/72369434530.pdf
    • http://globalnetworks.de/www.galabau-poscher.de/main/preview/ckfinder/userfiles/files/nagigozizupofiwixobagew.pdf
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/9484f00e8b941d4c4725dab08fed6221/39656295106.pdf
    • http://uci.ir/userfiles/file/68849110949.pdf
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/d72c96223b42cec3067977d0db455626/nibawekituvakuvozeso.pdf
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/1177445e92a5ec638e7e178d9e7e09f1/dimuj.pdf
    • http://ainut.fi/userfiles/file/15310962787.pdf
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/29170564da1bff4932448c94bc586d71/garukubigamale.pdf
    • https://juhaszautovill.hu/userfiles/file/33004868171.pdf
    • http://ottotech.center/userfiles/file/7198156386.pdf
    • https://vasantviharproperties.com/userfiles/file/29414310510.pdf
    • http://parquessolaresdenavarra.com/userfiles/files/dudemovufekosuta.pdf
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a26549bdd9e---2472733747.pdf
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/e70955828ac03ce5e4f88760aa427bcf/vuzukefejelepomapa.pdf
    • http://schodylux.pl/userfiles/file/58444431267.pdf
    • 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_off00010ccb.bin
b5a452e79f3cc2f6912bea94088d46bcb8dcb59b06dcb1140d6657aeda9f1051
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CCB 17964 bytes
font_01_sfnt_off00013bdf.bin
0fc26bc1e6c227e514bfa451db306578fb24092c57326cfe983c4e2daeb1017e
pdf-font-stream PDF embedded font (sfnt) at offset 0x13BDF 10648 bytes
font_02_sfnt_off00015420.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15420 16792 bytes