Malicious PDF — malware analysis report

Static analysis result for SHA-256 abc8f29e60e00aa2…

MALICIOUS

PDF

90.5 KB Created: 2021-06-26 05:18:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 57fab598b9a6b01812c26004811ed854 SHA-1: 68e9b123871cabfd4c6c6a47d8a6603ae85498f1 SHA-256: abc8f29e60e00aa2a4db2e138a6cf913c6c83f970bf4df71cd8c607e5994b88b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to websites that appear to be compromised WordPress installations, serving as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the nature of the links suggests a potential for JavaScript execution or redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/5eb6a1d792c8544641752e265b1ce292/soxufubifomug.pdf
    • https://daiichitravel.com/uploads/news_file/nunotidosus.pdf
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160785b8a8c201---8732488190.pdf
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608dcbe3b64d5---16478262503.pdf
    • https://bnovum.hu/downloads/tijesoxawevazurik.pdf
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/ccf541059035aa557e074dd1137d3c27/jazefekewawixox.pdf
    • http://ehs1958.org/clients/73155/File/40362535736.pdf
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/4dc76a42b2e4c1db55a492d4dea9f4cc/66678808049.pdf
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c48e340db54---84694158687.pdf
    • http://spreewaldatelier.de/img/editor/file/zelixofek.pdf
    • https://doucetplasticsurgery.com/ckfinder/userfiles/files/tusawotejabasava.pdf
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/47bb21c2e4729e82aad2865defd3215b/tivuxeririsedomis.pdf
    • http://extracam.es/app/webroot/arxius/file/71729510908.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2aae4d3fe3---24021265892.pdf
    • https://efnnma.org/files/file/mivixomototepabajepisu.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/ah0ti7jug7aegbg5g9ssuptin5/8795796061.pdf
    • http://onnetsolution.in/userfiles/file/23195977822.pdf
    • http://sunrui-ti.com/d/files/19323813182.pdf
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/5669bc4527732f491dce554b91881f45/vebapamasenixomedekejo.pdf
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/4b93b2d62767d20a748d90bcf2502f08/negadefivevezilonaketoxav.pdf
    • http://livelyway.com/ckfinder/userfiles/files/95924173506.pdf
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609037028dd74---49639029111.pdf
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/99889e1005365142707b69de9d06068b/misonavetud.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+cast+to+chromecast+from+mac
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9f7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F7 16792 bytes
font_01_sfnt_off0001020e.bin
9530f3334846821f2e6105a82f24cdbd9d58e13d224dcbe68f83400ba28ea16c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1020E 10436 bytes
font_02_sfnt_off000119c7.bin
2f37ea1b11ece644fef2f420fc5d5e29c860255d372ec3a711666e2589675489
pdf-font-stream PDF embedded font (sfnt) at offset 0x119C7 16204 bytes
font_03_sfnt_off00012f75.bin
2493f60d00ab23f8d4523297145a7c5768e47fc24f53c4e721b7a94bdd885164
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F75 17188 bytes