Malicious PDF — malware analysis report

Static analysis result for SHA-256 4048fd6d8d9236d9…

MALICIOUS

PDF

68.1 KB Created: 2021-09-04 20:23:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 84028019033604aa458542ec6ad5f0bc SHA-1: e7f0807267a31967f8442d5b2aa393a59b35f99d SHA-256: 4048fd6d8d9236d93860c96bccc872f796ed78dc7370d14c307a25f4d9ed0779
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to multiple URLs, some hosted on compromised WordPress sites, which likely serve as lures or redirect to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/2f9c4591b2751d8409925f7fc5c093a6/67342559311.pdf In PDF document text
    • http://kibbkw.com/uploads/file/xivebalolamigili.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/ghlbp3g2ls039hh8k1t8urc0gf/xijurobajowajebakigafiv.pdfIn PDF document text
    • http://ossokahve.com/upload/file/dutamaxedojemerob.pdfIn PDF document text
    • http://hublihorse.com/uploads/userfiles/files/75498317408.pdfIn PDF document text
    • http://appli-veolia.net/ckfinder/userfiles/files/xowogaxujawut.pdfIn PDF document text
    • http://mqskin.com/luutru/files/45477386386.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c4cccac6f38---39870152574.pdfIn PDF document text
    • http://worthingtonpark101.com/userimages/68415498729.pdfIn PDF document text
    • http://chretkinia.pl/userfiles/file/jotajuvutovakaxoses.pdfIn PDF document text
    • https://asiajitu.com/contents//files/31453512429.pdfIn PDF document text
    • https://securitegenerale.tn/userfiles/file/35148434270.pdfIn PDF document text
    • http://tsutae-f.com/js/upload/files/18410217956.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/56657651212.pdfIn PDF document text
    • http://boracayg.com/FileData/ckfinder/files/20210723_50F7177A049CB602.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16099fdb0dfe6d---96990753551.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc941bca21---17394953183.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160921de472748---55884683140.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6369dfe01---60243860557.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/c7fcb51f86fae52e5294f39afa311c23/92848179273.pdfIn PDF document text
    • http://andreuma.madteam.net/ckfinder/userfiles/files/21216062852.pdfIn PDF document text
    • https://novzelandiya.ru/ckfinder/userfiles/files/48200050090.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/c571fej5gjvp1mmh6vsc5qn1en/fixeja.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=fujin+irrigation+timer+manualPDF 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_off0000af68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF68 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c77a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC77A 14624 bytes
SHA-256: 6dc0ec872cef45a0a1ffae48192f99f9a9dab584d64b955dbdc90234e1be1001
font_02_sfnt_off0000eb4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4F 10488 bytes
SHA-256: 0f282d6a97b43646fc1dbdc15b0896931a877b6c6cb9c55389d5af4a0422bb53

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