Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ee5200033b3c8ec…

MALICIOUS

PDF

83.8 KB Created: 2021-06-14 13:21:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db6940a125ed20387daab0646acf7231 SHA-1: ac9e7de1433fee8670548363a750e84e39cee9d0 SHA-256: 8ee5200033b3c8ec92b84951921f58069bdfa240591f1a1a6b667fc74e135232
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and compromised CMS uploads indicates a likely attempt to exploit users through deceptive links, potentially leading to further malware downloads or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://philabc.ru/uplcv?utm_term=minecraft+pe+sky+island+map+download
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/e0b6afb6c9c92ab49144fe38f0450fc7/26028202646.pdf
    • https://elbag.net/wp-content/plugins/super-forms/uploads/php/files/b8bd610fea00d6f2e1f751be62982031/78302507806.pdf
    • http://agiusfuneraldirectors.com/files/file/wufabozefum.pdf
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070194f5e1a9---zapagarol.pdf
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/78d3a6bf54032b1ad011c4be629d48d6/57330540774.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160963b1be84e7---52417208497.pdf
    • http://yaqeen-eg.com/userfiles/file/54132817518.pdf
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/af2ar8pe9lktlob6ag7b2ljuue/46555362655.pdf
    • http://aodaibooking.com/FileData/ckfinder/files/20210601_594484BC0A6AEC7F.pdf
    • http://akinmedikal.com/uploads/file/46184303266.pdf
    • http://arohitourandtravels.com/userfiles/file/rolojeninalegivofoforum.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608054c699e8f---ranorove.pdf
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16086560684eb5---jusixited.pdf
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac472a820a---xubinefesazuta.pdf
    • http://amuseonline.com/absite/userfiles/file/gitatazoxitulezosabikipiv.pdf
    • http://onlineexpert.in/userfiles/file/xemogigofut.pdf
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/7905251b4cf1eaf887552d259cbd17ce/88114212186.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://scripts.sil.org/OFL
    • 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_off0000e652.bin
9542a116d138b265c4882f9113d19e3c4f43916f31be220c94b7e8e87dc6e563
pdf-font-stream PDF embedded font (sfnt) at offset 0xE652 3396 bytes
font_01_sfnt_off0000f278.bin
d30f0023cef83c6a00c978be172bf859668f9be571f9045affb3cc38011c9436
pdf-font-stream PDF embedded font (sfnt) at offset 0xF278 5564 bytes
font_02_sfnt_off00010574.bin
9edf27450aaefdbe482920ec54c40ce06c969d6e2e3b42348e37c6123411d2de
pdf-font-stream PDF embedded font (sfnt) at offset 0x10574 10916 bytes
font_03_sfnt_off00012afb.bin
b2cf57f29eb3b5e0c174876c58b70ef8fadd81916e6e05a17acc225f9629e7e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x12AFB 16064 bytes