Malicious PDF — malware analysis report

Static analysis result for SHA-256 09093b4e9db2b05c…

MALICIOUS

PDF

82.1 KB Created: 2021-06-26 05:55:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9e3fbd009a5d273dfb6e6bdb85eede67 SHA-1: b82c000bdb587d08c6dc82bdec3d49393a34ce09 SHA-256: 09093b4e9db2b05cc8dde4f859dac7825ddd8fcfe0fcb3b64d0cdcef8ce2a891
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external websites hosted on potentially compromised or disposable domains. The presence of numerous URLs, including those pointing to compromised CMS uploads and disposable hosting, strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allytemp.ru/uplcv?utm_term=clash+of+clans+best+town+hall+5+base+copy+link
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/4p33uri9hpausd9l3ancfjtg33/21482983978.pdf
    • http://susutour.com/userfile/file/88729370163.pdf
    • http://zartmobilia.com/userfiles/file/20210525024416.pdf
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f3865b2bb355d1d5242acfa466636d40/54556095020.pdf
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bf58d3871c8---polabagawomikexujoxepij.pdf
    • http://canxetaianhduc.com/images/file/tenab.pdf
    • http://elite-nails.pl/Upload/file/vofogasoda.pdf
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/61eeb6417bb4856d114a79437ea6390f/88497558599.pdf
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/160976b39c7b97---budinefetivu.pdf
    • http://asude.istanbul/ck_images/files/51446107649.pdf
    • http://bluekeydigital.com/images/pic/file/45115167045.pdf
    • http://dansensvenner.dk/imagesfile///xetezomevizom.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e0shj8i7nnbos1h6nvtep2vme3/vijaselomabipuz.pdf
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/b12f1eb81ea0602210ffdaf8a560d963/62246841803.pdf
    • http://massageindex.nl/images/uploads/63969862336.pdf
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9026162bd---6550155028.pdf
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160839f8041677---xolerejagoxixilisev.pdf
    • http://www.aadhar-interior.com/userfiles/file/83961792523.pdf
    • http://citywideok.com/clients/75789/File/somebufatidesexejepeg.pdf
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/30a23cb9df2f28e757dc31abdf15cbad/junumisusejipesimise.pdf
    • http://caphegiabao.com/upload/fck/file/38807151139.pdf
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086ec5952ff1---xugurumevawilapevobe.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_off0000dd6c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6C 16792 bytes
font_01_sfnt_off0000f57e.bin
44ae442b81617ea1dbcc0aafff897aed3b928d473e865703cce16754dc802ac9
pdf-font-stream PDF embedded font (sfnt) at offset 0xF57E 16896 bytes
font_02_sfnt_off0001215c.bin
c04078d5447fa012bbaffa95fc9a1fe24001bb154d2d9cfe4fd54daf3a4c0c01
pdf-font-stream PDF embedded font (sfnt) at offset 0x1215C 11076 bytes