Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bafe2d58ead143c…

MALICIOUS

PDF

85.7 KB Created: 2021-06-28 01:10:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: c3b00dfe0353ce70bac51b9e735ed412 SHA-1: e33845be3499106e4ef1e46f9cbc665978c8e748 SHA-256: 4bafe2d58ead143c3e0e480202368d8ce798f6b06de0bd2babc5f5c17704feef
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://galettedesrois.hu/userfiles/file/nelajeretarevo.pdf In PDF document text
    • https://anmimar.com/royal/userfiles/file/resirunumefa.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/466d538a812d5acc93ab012527e845da/vokirelarisodopukazutaku.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/r9bu0sa2ten1q66o0gm2bvjcf4/xoxogegajajodupegega.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/7v4bqsfeq97teh3mklalagvnm7/xijumanupiguzenarujurojom.pdfIn PDF document text
    • https://promtong.com/promtong/temp/file/miwilolunosubora.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/a0c02c9875e1400080a0f1893f9ef382/44044810686.pdfIn PDF document text
    • https://robertbah.si/files/file/59534090594.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/zuzepivotumoval.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a59e2229d01---vakikirumofezenodalafo.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/6eab133c30457087f6477d71847535da/38994302405.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/a4e034c2bae0a4636d766f6e47675b11/javalixidufipulijitivimux.pdfIn PDF document text
    • http://euro520.net/userfiles/file/16240885612084185918.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8apirfi9s9cn9maai47n90dlf1/zoxobemuxaxuno.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cab070c2e8---11207330499.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/nhidi1v63mt08kc6aa6uabtk20/gaxumisowodimiporutuk.pdfIn PDF document text
    • http://stevis.cz/files/file/kerokuluvoz.pdfIn PDF document text
    • https://recapress.com/ckfinder/userfiles/files/17241398703.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607468b491b64---rupupozebukixekizaz.pdfIn PDF document text
    • https://topupdana.com/contents//files/52800196297.pdfIn PDF document text
    • http://gancza.pl/userfiles/file/19896896670.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/12210f57e730d988542de52cae649be8/ponewupumagabemebe.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/mazuxivaxu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=testng+interview+questionsPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC59 10436 bytes
SHA-256: 6a897efd54d56b0b3073a0b8e7590941ffc18fd619eb97b16821e11e67f4190d
font_01_sfnt_off000103f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C04 17356 bytes
SHA-256: df2458b0cd5feb3377c18809cfdc9fc46cddef6a9a4c1c6181228358f38041d2