Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eeadf3ebb2de0ea…

MALICIOUS

PDF

74.4 KB Created: 2021-06-29 14:59:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: acde5e323eb522ff6da5a8d83fc1c126 SHA-1: 9816ecb2361631031f3bb39598feb7ff2d24e08e SHA-256: 4eeadf3ebb2de0ea431f2e50891a175bf50bb969bc17f77c7233717ad2ce19a3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or scam campaign. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were extracted, the structure and embedded URLs point towards a malicious link farm designed to lure users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/153c5eeb1042d422f268a482f970f1dd/58433114608.pdf
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/0c5bd1341b51793ba8245091400b6341/6815628205.pdf
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b173e115b0d---zuwusagokaxakawidexika.pdf
    • http://ahxxzx.com/userfiles/202105/file/40759991272.pdf
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abb94ca898b---fasav.pdf
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/cd1f01c5791be52bd3ce95d4c7225afd/pufizenabura.pdf
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/d7cb5fd3c0936eb3eb076106901738de/jusimojeze.pdf
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/523ec9229467ae1c667f96d1622cb615/wolamejo.pdf
    • http://lncxjzxxw.com/upload_fck/file/2021-6-15/20210615144334232608.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dae1e681638---75030508412.pdf
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609ccd2ac1cbb---dupofofekujife.pdf
    • https://pasarantogeldua.com/contents//files/suxebewu.pdf
    • https://angkoronetour.com/userfiles/file/gubixefuvamedavegaxefelin.pdf
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ba79a99e86a---rolukevodokakaxat.pdf
    • http://studio-castiglioni.com/userfiles/files/wokogemadupufoxegarasov.pdf
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/actc6lmr503aud0s8lsi2ct080/733057525.pdf
    • http://ctyrkolky-gamax.cz/data/dokumenty/99063565151.pdf
    • http://air-ned.com/uploads/files/lagalabegadivewas.pdf
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/1609aaed71d627---41356309264.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607db0bad9dad---79612224538.pdf
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/8f4eefe779e4231b3fb8a5d88f897010/72966790945.pdf
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1609504bdd171a---pimomufaleresib.pdf
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/32093657c1ca787440cbe2f2e22a6a05/dulilirujonudo.pdf
    • http://apexnepaltravel.com/userfiles/file/josenimepefalepi.pdf
    • http://ebsenglish.net/_UploadFile/Images/file/8862789779.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=fast+and+furious+4+full+movie+watch+online
    • 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_off0000c000.bin
047a815081a8bfec4be4d158b9686b5d388f52e2db8a3cf3324d786452a993ec
pdf-font-stream PDF embedded font (sfnt) at offset 0xC000 16364 bytes
font_01_sfnt_off0000ea6e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6E 16792 bytes
font_02_sfnt_off00010285.bin
516ba7107401eda852272eb3fc07119727271b5e363f2ebb2d19f6e1c0da7215
pdf-font-stream PDF embedded font (sfnt) at offset 0x10285 11048 bytes