Malicious PDF — malware analysis report

Static analysis result for SHA-256 e30a6f9815ba5a45…

MALICIOUS

PDF

78.2 KB Created: 2021-09-13 12:16:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d268379b4c457fa2bb136760cbe5c015 SHA-1: 206c004f1033756462366dfaf028a617e0448659 SHA-256: e30a6f9815ba5a45b5d6085e0cb382c9a90b4eca93448b4d41d2ecb72b3eb8df
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, with numerous embedded URLs pointing to websites hosted on potentially compromised or disposable domains. The presence of these links suggests an intent to lure users to malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://kiapelhrimov.cz/UserFiles/File/movupebutiv.pdf In PDF document text
    • http://akpanlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xumovaga.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/18400943803.pdfIn PDF document text
    • http://guanzhuli.com/userfiles/file/fugudibejajalejuvalejoto.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613b8bb39d126---suxegipimavimavagutamilid.pdfIn PDF document text
    • https://zapcdn.space/web/img/podborky/files/89787987483.pdfIn PDF document text
    • http://ventss.ru/userfiles/files/mapizapanekawa.pdfIn PDF document text
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/7742065278.pdfIn PDF document text
    • http://poltinik.ru/userfiles/file/28506579254.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/28361291400.pdfIn PDF document text
    • https://deltarealestate-eg.com/userfiles/file/ramuzikagemazejinod.pdfIn PDF document text
    • http://www.hermosabeachbungalows.com/userfiles/files/79881215942.pdfIn PDF document text
    • http://ambvetesopo.eu/userfiles/files/julutejamuwiwamup.pdfIn PDF document text
    • https://ooo-kenk.ru/userfiles/file/35009242218.pdfIn PDF document text
    • http://eva.am/files/60e2831b7dd80eb6.pdfIn PDF document text
    • http://kleinschaden.expert/userfiles/file/puxutinasimuxupagimi.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///gefig.pdfIn PDF document text
    • http://jjw-led.com/userfiles/file/zilelati.pdfIn PDF document text
    • http://koala-al.com/d/files/3979068725.pdfIn PDF document text
    • https://lekkermooi.nl/userfiles/file/3857304146.pdfIn PDF document text
    • http://songhandiban.com/uploadfile/file/2021090304382673499.pdfIn PDF document text
    • https://profitaler.com/UserFiles/file/32281271897.pdfIn PDF document text
    • http://imobiliariaimperio.com/files/files/95836924013.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/7750a52f755d65a6b8c8410b5ead1fff/wizuwetuvigosanajuvijip.pdfIn PDF document text
    • http://vishwkarmaenterprises.com/webroot/img/userfiles/files/mujopejabagepabuko.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=lessons+from+private+equity+any+company+can+usePDF 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
stream_005_off00011108.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11108 10976 bytes
SHA-256: 8899c8b601d55fa3814c9b2f908758cd1661dd9dc451820080346dc9f9c79d3e
font_00_sfnt_off0000cd8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD8A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e59c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE59C 16752 bytes
SHA-256: 27a8ae421ce2ff17dd91b159909937ae74ffa4fa68a9b54e5a984689aa4ad2ea