Malicious PDF — malware analysis report

Static analysis result for SHA-256 5726ca584387d4d9…

MALICIOUS

PDF

92.9 KB Created: 2021-06-13 16:06:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1fb2fd6a3e69221b50668fbc3bd24056 SHA-1: 188a2ffa7b284f4b29206ba4475198866e9c49c4 SHA-256: 5726ca584387d4d9e6bbe67453011373beb5f4c2176024ae7a8184c42f3edd67
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which appear to be compromised or disposable hosting, suggesting a phishing or malware distribution campaign. The document body, though heavily obfuscated, contains text related to video downloads, aligning with a lure to entice users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://crewmak.ru/uplcv?utm_term=bewafa+shayari+video+download
    • https://dodatnagarancija.com/userfiles/file/80820504666.pdf
    • https://burgas-remonti.com/userfiles/file/47359901727.pdf
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609da81c8b2ea---84446016514.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160759585a93f0---kuduwefaxokuwitog.pdf
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a974048c736---jaxuzusapelizezapijek.pdf
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/7304895ee261d74e82de7b755765a99c/58299124747.pdf
    • http://vasvaripalmuzeum.hu/upload/file/nilijapexofew.pdf
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff3d274aa1---51615270712.pdf
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5d213e99cc---32452512180.pdf
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/872c2a7022de30e38170b96bda6aa37c/78033202009.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16080a5d9e3694---vinimijek.pdf
    • https://plasy.com/uploads/file/fofanerogavawagegokes.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/14077d22fc698f3b16b215abbc94bb9f/levopebuzigosup.pdf
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16094a41fa1e6e---sapugunugodokun.pdf
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609655280d1dd---bifosekesujififapi.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab59fda61a0---bafimig.pdf
    • http://svsteinfurth.de/radsportfiles/file/96139975651.pdf
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c11f674acd3---mufoxifaxaj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • 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://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f86e.bin
96b02300627a6d291f699ae06cc5d4b5750119eff06cfb4da5804369d44fabae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF86E 5004 bytes
font_01_sfnt_off00010973.bin
81309faf1025f1054cc112915a1fe76a7b7ef227bfbaf02f08cdd80473fe7a24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10973 1792 bytes
font_02_sfnt_off0001124d.bin
9cb56c45592de9f110d889c50c9f73317a0c24851d38fc786e62561e393a3c46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1124D 10772 bytes
font_03_sfnt_off00013732.bin
2e9a99725a8f8a19843aaa41623036ea9947852e956a8c210d4bb6ee0e903590		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13732 16568 bytes
font_04_sfnt_off00014dc9.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14DC9 4324 bytes
font_05_sfnt_off00015b7b.bin
1648accd5638f26481c437d0e436fdfb03edab78dab75f4e73239278c8cddc19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15B7B 1736 bytes

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