Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a0ccc369d9f2b67…

MALICIOUS

PDF

86.1 KB Created: 2021-06-25 17:50:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 980bc00b0aa087af0d09601a44baebba SHA-1: 800ca0495217937883632d08d1090a563d8af4fb SHA-256: 2a0ccc369d9f2b6767e7972604564990a462d89f05077d4d1a044aefa9cf6037
156 Risk Score

Malware Insights

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

The 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 hosted on compromised CMS uploads and disposable hosting, with numerous distinct hosts. The embedded URLs likely serve to redirect users to malicious sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/7eb36b0df94501d06d0999be3ac5f7c2/6872640184.pdf
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/640aed5f4cad09114402e938bf6e49de/82608299939.pdf
    • https://rubyyadav.com/nbloom/fckuploads/file/80400278596.pdf
    • http://mdsalon.ru/img/lib/file/rozozuxexamefapurokadeze.pdf
    • http://ed-web.cz/userfilesfile/simoledusatofolimute.pdf
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16088eeb264a77---fipegejezowa.pdf
    • http://sola-brothers.com/userfiles/file/71858404045.pdf
    • https://ajitcoatings.com/uploads/vetekijedetivominad.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160773ed216cb8---xurutop.pdf
    • http://www.contectrade.hu/fckfiles/file/xujedagi.pdf
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b04a6d3d4---94600370418.pdf
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cfb0b1cfa3---81627052054.pdf
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608be1614121c---40051473869.pdf
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c57fc2d7c1b---doxudar.pdf
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/334aaa6943c4bb20d706bdcf74e348b8/64586339082.pdf
    • http://karpatskiles.ru/store/files/22544859273.pdf
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/kurozibodupedixu.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d813eb060e---kileg.pdf
    • https://nikoljski.com/ckfinder/userfiles/files/54710911499.pdf
    • https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/747b25cac952ab40d55490f146ea5432/wixubowa.pdf
    • http://appletechsolutions.com/userfiles/file/83340689181.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160afcfa36b33d---6083717830.pdf
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/3c0kfdioq3tue83dag5nhif836/24810227407.pdf
    • http://pitafest.com/clients/1/13/1337b7689af00ddd847345d48bd720ff/File/ninuzonuxibasutokeno.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b86856add50---43188294295.pdf
    • http://gdlianyu.com/uploadfiles/file/tegesuwokaf.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=what+are+the+monomer+units+of+dna
    • 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_off0000ee31.bin
28819b2c6e5d73cc8ad302730bf258e8491d4e4a1c78e3c6d50dc48a9f4e5071
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE31 16968 bytes
font_01_sfnt_off00011a99.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A99 16792 bytes
font_02_sfnt_off000132b0.bin
37baeda4b37cb61a89a2622e8e2ccbced2a52ddecaecd55507a38f2a0d29e1d9
pdf-font-stream PDF embedded font (sfnt) at offset 0x132B0 10668 bytes