Malicious PDF — malware analysis report

Static analysis result for SHA-256 14ee9eb82deaffaa…

MALICIOUS

PDF

86.6 KB Created: 2021-07-31 04:19:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5490f061cbec63ba618d4624f32ae785 SHA-1: 0b776b98bea3e5a5b3c18ca6fb63a64ad7f0d578 SHA-256: 14ee9eb82deaffaac68ac80596dd2ea626021bdbc0ebcf300b8c411455d271b3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm, with numerous embedded URLs pointing to potentially compromised websites or disposable hosting. These links are likely intended to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pistant.ru/uplcv?utm_term=jedi+fallen+order+new+game+plus+cosmetics PDF link annotation
    • http://w-mill.jp/images/file/76930073994.pdfIn PDF document text
    • http://blbr365.com/userfiles/file/1625152917.pdfIn PDF document text
    • https://vietucmould.com/img-vietuc/files/daduzepanenowida.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075bf932e6de---kodijeximew.pdfIn PDF document text
    • http://inciboya.com/resimler/site/files/sigeruko.pdfIn PDF document text
    • https://yingzhaoliuart.com/upload/file/19603781499.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160fa49e107ec2---nosakoj.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/ximilaxegelaz.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/b10322487e2df6beafab3ea390fdfc15/voviburazamujugu.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/fcd56f458062bf2ef841a1f35c6b38c2/tavixepegobizol.pdfIn PDF document text
    • http://cropscipublisher.com/files/upfiles/file/lugokirokorefunijewe.pdfIn PDF document text
    • http://abwingsmd.com/uploads/files/81904218421.pdfIn PDF document text
    • http://thaimassagemodel.com/ckfinder/userfiles/files/61933642549.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/92648191550.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/fuv5afgkepfpe2emt91thenhnm/74943315533.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e29ed45410c---24675113668.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092829e171b2---lubofokugetegoku.pdfIn PDF document text
    • http://ikhmongol.mn/ckfinder/userfiles/files/xerinaz.pdfIn PDF document text
    • https://arerp.kr/data/file///85821354579.pdfIn PDF document text
    • https://www.profiemg.cz/upload/ck/files/komisowemux.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bbbfbf8c431---89247463440.pdfIn PDF document text
    • http://tafgambiatours.com/userfiles/file/rosiriz.pdfIn PDF document text
    • 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_off0000ed42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED42 17300 bytes
SHA-256: dca1764a7dc6def11d6de1792f002a831a424bad2df4b0227419544d46538755
font_01_sfnt_off00011a92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A92 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000132a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132A9 11140 bytes
SHA-256: 43557cf1b8c01c5b236cedb4b9593864c20693657ef0a7d73de0b8f2cbf2a05c