Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa75ccc77fbe6a65…

MALICIOUS

PDF

90.3 KB Created: 2021-06-25 22:38:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 2af2e6203cd1c468bcae1c9fd4cdc3c4 SHA-1: 7200e9b1e3b05ecf1dfd444d2b9452accea22220 SHA-256: aa75ccc77fbe6a65fe9934d96a31959eb8a872dffa19720d07d657bb76eabc57
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting. The primary purpose appears to be directing users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/v3plcqs290b2hdhv3rtmgbf9m6/mepopik.pdf In PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/9f44c2359de2cd38c1f2731d00c4b74d/zafinumutirim.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/67802089220.pdfIn PDF document text
    • http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xuforatikigigu.pdfIn PDF document text
    • https://rainbowfurnitures.com/files/files/50805216790.pdfIn PDF document text
    • https://vokalensemble-vocembalo.ch/userfiles/file/nigovawusagidamoxaz.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/3796a1597956fd1fab1b261dcfa1ab7e/gejagimesofuso.pdfIn PDF document text
    • http://www.sanruou.com/app/webroot/uploads/files/ganigege.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1f8fe4682---xujomerolemumarovujajane.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/fol1h9mff3c7icj3nl11mso1i3/sokupesajogukexekifa.pdfIn PDF document text
    • https://carrieres-pierre.com/userfiles/file/64778173772.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/j0n712psq660hhohdnvcp66nv5/sojawisemoxarozopoposudu.pdfIn PDF document text
    • https://roc.mn/uploads/files/93764779498.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16092c3a2b8494---pixotojarugeg.pdfIn PDF document text
    • http://berallebags.com/UploadFiles/FCKeditor/20210523035048.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/jhqfm9ion533omnllga91b42i2/5840436888.pdfIn PDF document text
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/da5294c1d8be14a2966c4ac5f6a89d2c/bowijimew.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf397a8785a---58529794317.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609843d003ce9---29352875967.pdfIn PDF document text
    • https://kanalprofi.at/UserFiles/file/gaxefogumevigiguwefo.pdfIn PDF document text
    • https://sgpropertylawyers.com/wp-content/plugins/super-forms/uploads/php/files/2bd68fe390e34f74af056acb32689723/satifo.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ff586b011---firajiwibesamaxe.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/rodemokerovam.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/569051233a586ab9fa1c54241c280dd4/11280263823.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5cab09142b---tokajitedidadaxekesivit.pdfIn PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/pemuzuvatupokigufagizoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=character+of+shylock+in+the+play+merchant+of+venicePDF 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_off0000fda2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA2 17000 bytes
SHA-256: f50297259a4cab3e20c56df4236cd1f1658cdcc456a9deed0cb807cd32d7b1e3
font_01_sfnt_off000129b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129B8 11048 bytes
SHA-256: 9f9f41d6055c52176dcad39ae10b72be1afbb07730af21f1cfbea0745d2c03c1
font_02_sfnt_off00014355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14355 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1