Malicious PDF — malware analysis report

Static analysis result for SHA-256 eade5bec12958f2d…

MALICIOUS

PDF

74.1 KB Created: 2021-09-11 00:52:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 17e702294f6d26a1454d9992e055def8 SHA-1: 325d191ba5a61c2a034e88e85d7d1bde57bcb109 SHA-256: eade5bec12958f2de1087bfba6072276207125e0bb02a0c43a2dbfa79eb138d1
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a large number of embedded URLs, many of which point to disposable domains or compromised CMS upload directories, indicating a link farm designed to redirect users to malicious content. The presence of these links suggests an attempt to lure users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://esistore.be/userfiles/file/48737633515.pdf
    • https://dalilak1.com/userfiles/file/51799691721.pdf
    • https://ienter.bg/files/mivogonezubabi.pdf
    • https://anakmeong.com/contents/files/sopakoxerosujatoz.pdf
    • https://avflash.nl/upload/files/xonitikorovum.pdf
    • https://www.bnbtravels.com/ckfinder/userfiles/files/nifidu.pdf
    • https://eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/98355490810.pdf
    • http://musorcentrum.hu/files/article/file/xisajiwijebewa.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613305f0a1cc8---9144869233.pdf
    • https://viadagio.be/userfiles/file/68981812908.pdf
    • http://morecoredesign.com/images/imageUps/files/4666711773.pdf
    • http://xn-----6kcaheblih5ab0a6afqbzoqe.xn--p1ai/ckfinder/userfiles/files/23929418199.pdf
    • http://cn-daomeng.com/upload/userfiles/files/a73ef7749f04a2974c22ead2cecfa908.pdf
    • http://agrocare.hu/ckfinder/userfiles/files/11479966814.pdf
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613a754dae1f0---fifemu.pdf
    • http://izumrud38.com/ckfinder/userfiles/files/15284187140.pdf
    • http://ormansagszive.hu/upload/file/raxati.pdf
    • https://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/45951097352.pdf
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16133d138c82b7---rirazika.pdf
    • https://bbox.ru/images/shared/file/4170528362.pdf
    • https://eastmangroupllc.net/ckfinder/userfiles/files/vaden.pdf
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613b9a0569451---lefot.pdf
    • http://brenno-tojestto.pl/userfiles/file/94353536222.pdf
    • http://faw-asia.com/image/upload/files/8363621187.pdf
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/35931e6483f42b9a38cad3d9beb1d0b3/17739675778.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=payback+1+apk+download
    • 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_off0000bee2.bin
f97429767ae7abb2a6bee8d6aaf6660fc60739d30e1c0462e606f4c755b3e548
pdf-font-stream PDF embedded font (sfnt) at offset 0xBEE2 17264 bytes
font_01_sfnt_off0000eb35.bin
ff54af764fabdf1382631438e591c249c8e585ef718c514011fa741ce1b26158
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB35 10400 bytes
font_02_sfnt_off000102bf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x102BF 16792 bytes