Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ce14d36e2142d4d…

MALICIOUS

PDF

90.9 KB Created: 2021-06-29 22:01:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 05d22101d67edd0dfc5a2f7aa3b0a5bf SHA-1: 9676b3b9bfa020bbcb4e2b87309eb72b9febd7ea SHA-256: 1ce14d36e2142d4d378c946e9c56bf0981224a4af78575b568ed95d8d24fc52e
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://savitapiti.org/ckfinder/userfiles/files/pilupemov.pdf
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/63c81817988e59aefd2f8b7402edeea7/dajakogesesitep.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16077596c947d7---22494893120.pdf
    • http://munsusa.org/userfiles/file/20210608062809.pdf
    • http://self119.net/upload/userfiles/2021/06/files/210606144237.pdf
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/7203dd09e77accf208fc9d02abbd22c3/25281476287.pdf
    • https://moto-trend.cz/public/files/fck/file/6107213284.pdf
    • https://rachelrom.com/rescontent/file/fofapapeletatiwadamowofiv.pdf
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16093c9ff299e9---78149057793.pdf
    • http://herculesestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wosunejejutuzezisagitol.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7b0b116ed---59696324337.pdf
    • https://nevisnews.com/userfiles/zokufoposo.pdf
    • https://sardavetri.it/userfiles/file/67783732777.pdf
    • https://mygo.com/ckfinder/userfiles/files/juberalikaduw.pdf
    • http://esebtekstil.com/resimler/files/nedafiselemuzitedimura.pdf
    • https://eternalbliss.net/file/dewonogotaxelumad.pdf
    • https://ewastexperts.com/userfiles/files/99788098256.pdf
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606caebfec0fb---ruledimosoxakol.pdf
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/728c871e6a8f1e2869314082a8796cf7/ribomubabu.pdf
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/av4hlmnigdkah9iohlji91dair/fuxajag.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/365hoao5ild7fg083e1aucpf92/18985119981.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/rk3lne0b54fgfad8hk4ib178a3/kibuvadekoruzenagapofit.pdf
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ae63a32380ceb4b8f38fc916f03c4f3f/47451697461.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=questions+to+ask+au+pair
    • 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_off00010210.bin
f9d68d4f5a579969ed1e27f5c12ac8245cb12932ceb79b23b7e734617426d909
pdf-font-stream PDF embedded font (sfnt) at offset 0x10210 10452 bytes
font_01_sfnt_off00011a10.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A10 16792 bytes
font_02_sfnt_off00013222.bin
b118d7b4ee834cb586d24c6632c1e2f1d4505debb3a3233fb557c01e981f1e55
pdf-font-stream PDF embedded font (sfnt) at offset 0x13222 17040 bytes