Malicious PDF — malware analysis report

Static analysis result for SHA-256 c97ed2baa81b7322…

MALICIOUS

PDF

91.8 KB Created: 2021-06-18 07:07:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e9c68e69a1a30c7e5ad3973fe8e6fd97 SHA-1: 5ab0825ac8341de8203211a92b86c50618b3134f SHA-256: c97ed2baa81b732224eaab2a167d237b966870b83c327fc594deba0b2688ad88
154 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs, such as http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/99cjt9ag324vvt1g76f3bbt833/94564652739.pdf, are likely part of this lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7943

Heuristics 5

  • 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
  • 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://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/71f5a50c35f7e3d5b576b0eecb6a2dc7/95052369289.pdf In PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160968f00be279---milopinelofekare.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/55g2n4obkioe6iqi3214n3pvh4/1563181414.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/94fbb1ed81b03fab74b463af501eb57b/bodewab.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/77384d1dcdc7bc48a0702dce25bba712/gapidasopafubovidejaw.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/99cjt9ag324vvt1g76f3bbt833/94564652739.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/f39f95e87338b971badd57af3bdee3a2/81582391755.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bce5ac0ad98---vajozinubowutop.pdfIn PDF document text
    • http://alexhoffordphotography.com/temp/files/file/14221883387.pdfIn PDF document text
    • http://yasaitogo.com/uploads/files/supamifetatupif.pdfIn PDF document text
    • http://tlumacz-lipno.pl/pdrzewiecki/files/kozut.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/6ff96658e75dee7ed38c550738cd2c38/wabajusigomesawarero.pdfIn PDF document text
    • http://andreaslasnik.com/data/files/98655841994.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/suworilisagerifubufebagu.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/svuva3l8lr63ohq1db2per5l1c/warukamikibibor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=firmware+tx3+mini+android+9PDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f51f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51F 9080 bytes
SHA-256: 7b6e885ca9d1ad439fcf7946d5dd1f0cd6c52cd79d510118da9a9a1fe0d0644a
font_01_sfnt_off00011317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11317 5196 bytes
SHA-256: 34ee61181261e27cf6cddba4a2b70f459d4139271a31ce58a528ea82862206c3
font_02_sfnt_off000124bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124BD 28024 bytes
SHA-256: d62cea16b3707eaa43b294ff3fe77608df856a92d115960d6e23f2acc0e4b4cc

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