Malicious PDF — malware analysis report

Static analysis result for SHA-256 7463beb7db91c261…

MALICIOUS

PDF

106.4 KB Created: 2021-06-19 20:50:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 87f4d3f2a93ca23423ed34d6855608af SHA-1: 27a2eb07584ae0424a96aa054edd0a014870e312 SHA-256: 7463beb7db91c2615f3c20e5fa83b277d619a5935e5dd6c9bf1efb169753e92e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous links to compromised websites, specifically leveraging WordPress upload directories, to host further malicious content. The document body, though heavily obfuscated, suggests a lure related to movie downloads, a common tactic for distributing malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e764bc485f---papuxuxatu.pdf In PDF document text
    • https://llibreriaha.com/img/events/file/75666344974.pdfIn PDF document text
    • http://studiospazioambiente.it/userfiles/files/nufisumefasusaxerizubisal.pdfIn PDF document text
    • http://daugiavanthienphuoc.com/media/ftp/file/29439234446.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d1a57bd00---nanenijinofumozakegisugo.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/19d8a4567451b9dc54e0990dc611d6c1/99156954680.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c05d33c8451---82339869499.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/0e8d9482a870136ea953318a9852928f/menofakusejalukipiwilo.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/da7d2ed4d8c9642e1f36a6b93b0f0e67/29637634705.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/3bbd072f6d0467ad8d84e85145239aa3/34026285971.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/jmri1v029ab87c9eadsftg6rm6/mavut.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/f8m9a6dr5qdpgebfja73n8s0nh/dixagoronebojemi.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/jvlei9o16nahkqiq9ggvkm57dv/sagajojijagefadolexafameg.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dfc2587805---jawidazofanawizagawoviduz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=kaavalan+tamil+full+movie+with+english+subtitlesPDF 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://scripts.sil.org/OFLIn PDF document text
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000125cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125CD 5348 bytes
SHA-256: a0436a07de10d0e20691d54875c1c1e0e139ab69777ecc93216b32f7c9519943
font_01_sfnt_off000137f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137F8 4512 bytes
SHA-256: 4662f9b1ff93e4affec7fbcbf71ee7bb234bc1c03fa1d6d22d72930b00e69471
font_02_sfnt_off00014814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14814 2672 bytes
SHA-256: d409ff94869b5c71231bf4e53198ee738950abbd9cb9e9071aa1448dbbc6eef6
font_03_sfnt_off0001529c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1529C 16644 bytes
SHA-256: 15b223e362db54bcfe5252e53c90caf3d58a1a99f910b684108e1d3ed8fb3552
font_04_sfnt_off00018618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18618 16164 bytes
SHA-256: c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e

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