Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9408adc9bafaa53…

MALICIOUS

PDF

125.4 KB Created: 2021-07-04 07:54:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d72035b3ff4db5e4ec0c6d76cc73c65b SHA-1: 45a354b79dc46acdd568bb73c0703751ec7d2828 SHA-256: b9408adc9bafaa53a11a5107abc1873094a3e9626221e472b27eca7144153d00
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised CMS uploads. The presence of these links suggests an intent to redirect users to potentially malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9635

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://garglob.ru/uplcv?utm_term=constellation+known+as+the+great+bear
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/b697f2fd88949e11e0bac6caaf8d034e/rexiwenopalijibikamiro.pdf
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ddff717c2b5---21725409704.pdf
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1607bdcdd95e39---68581177992.pdf
    • http://studioingegneriavaragnolo.com/userfiles/files/jofezamuk.pdf
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7604b9b9a---kokadupipubejuxomurog.pdf
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2d32ea316---70887533589.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160906bb9acb94---nokob.pdf
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/a8205d08f7d78c8b13b759048e49a577/jovobezelili.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a02ea54a10f---31386259921.pdf
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/16090638d0187a---31762616325.pdf
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096e709b7627---xanakunubevudalud.pdf
    • https://itracmediav5.com/ckfinder/userfiles/files/86702455250.pdf
    • https://mzr-avocats.com/buddha/ckfinder/userfiles/files/738901100.pdf
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2ee2ffc9f9e986286cd8e8a331d9fe8b/38600411029.pdf
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/e9f0d6e7ee8477254440746c005ecd5b/kudifovubitexazasufi.pdf
    • http://leton.pl/userfiles/file/19868110889.pdf
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/c79e5ea0622de5059f3593eb86b42fb5/suvuredolixivofisotaxexu.pdf
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/9ludsdgnaiu3ddvbe098v8hjv4/mopanozefusofusitiw.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16081588b2ed75---54822710777.pdf
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/b039f8226118e0743014287c81cb497a/vidipolik.pdf
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/970382fe6428506e0a4e94ddad4bef12/xofajar.pdf
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4ffb017a82---wogaxeguvasajuzibuviv.pdf
    • http://de-ko-gmbh.com/ckfinder/userfiles/files/bixafixuzarumumadebotufed.pdf
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/e9bd27ea990a5c75bfc8f56b45371c0a/95664480718.pdf
    • https://www.rekalibracija.com/wp-content/plugins/super-forms/uploads/php/files/355f1f4b5cfcbe4f6797218ea1cf51f0/26166627727.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014dea.bin
6d0cca96071574cfe8eb217ead634df4477e10c3c50d3470b43ee0120dbd420c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14DEA 24540 bytes
font_01_sfnt_off00018c0b.bin
5395cdfb8a2308b886a9b73cc33ec6b2ea7a426605fb88bf57b23787a09c403d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18C0B 10736 bytes
font_02_sfnt_off0001a4c4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A4C4 16792 bytes
font_03_sfnt_off0001bcd5.bin
338cc954a946a7fbf70b29c55d5e66db99b2ef151e94d540d22e7b387f44db23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BCD5 16232 bytes
font_04_sfnt_off0001d2ab.bin
8238d72ffd0e9abde6b68eab1c1223c7f291e1038187671b45fa19f6e1c71866		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D2AB 5348 bytes

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