Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6a708f3b9bdf821…

MALICIOUS

PDF

92.1 KB Created: 2021-06-30 03:06:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 17b68fbb071785798d1536026bdfc0b7 SHA-1: 3edb3f1f3300e4b88fb4d8e603b5c661456608e2 SHA-256: e6a708f3b9bdf8212a58e45551fce64fdf3805fcaf49337535eec807446df164
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other potentially malicious domains. The primary purpose appears to be directing users to malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c864bc13684---defovidonugogefupaxus.pdf
    • https://tidymoney.com/ckfinder/userfiles/files/35239254240.pdf
    • http://planbmedia.hufiles/kilanutatix.pdf
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16076eeaae95e0---35892731541.pdf
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/29f71c65161e9708f0a64470e0bd1130/pesibimazofazanetotuwe.pdf
    • http://hyderabadibiryanicorner.com/admin/images/file/99848728605.pdf
    • http://security-m.jp/tool/images/file/menanamosul.pdf
    • http://gmkms.net/upfile_editor/2021/files/wemefadanejitara.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160877cbf22375.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c94e460d7e8---1626135105.pdf
    • https://binarbaid.com/public_html/userfiles/file/tigeraduwaronolakilanewaz.pdf
    • http://hpworld.hu/data/pic/Image/file/83947379296.pdf
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/r51ld8brh60sqj5cctnrefcov2/22718638702.pdf
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/01759a2f2b8f779d87962814470158c8/16239741055.pdf
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/3nhamtjb39ni2884eq3lsjeh59/80967374108.pdf
    • http://kbchina.de/upload/medasubulewed.pdf
    • http://abimobiliare.pl/pliki/File/toludetasizetavutivaxe.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/st799m5e4g6psru87ed02dq6l1/rivegutadulidopulogi.pdf
    • http://beijingxinzhi.com/userfiles/file/20210520100834_830458856.pdf
    • http://bjjiffy.com/upload/75334719533.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/50edpqra28590imm18m4qafld2/mokalumabom.pdf
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/torqnmoe3h1d2v1a7t61mkqmqh/jonixosonajixesilujivas.pdf
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/5d0187b1ae8075534186d0c35def9aa5/ferixoralopelezefikad.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d22bfb8ab14---44518817906.pdf
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/9a4oj87ujjb6asao5nv46pfs52/22347344427.pdf
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5cedaf911---gaxidajavididowoke.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=best+fantasy+linebackers
    • 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_off00010306.bin
b554e74158b280877fa23fbf8d75ac2f3aff433d900a74cacce0cc42e013defe
pdf-font-stream PDF embedded font (sfnt) at offset 0x10306 17956 bytes
font_01_sfnt_off00013284.bin
f44f827bbb8fab8dbb2f61aa2f2bce1211f0e65ef9fab887b7cb55544fbf5b8a
pdf-font-stream PDF embedded font (sfnt) at offset 0x13284 10608 bytes
font_02_sfnt_off00014af6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14AF6 16792 bytes