Malicious PDF — malware analysis report

Static analysis result for SHA-256 86248e8549efe599…

MALICIOUS

PDF

73.2 KB Created: 2021-09-07 04:27:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0ae97f6d58aa3ca05353e8615275e4ab SHA-1: 6e362b15fcf3f00680979ccf79efa59476d478d5 SHA-256: 86248e8549efe599c20c46ab550c8c67ad6e51bdcfb8cf0b29380d04e2667c1c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains a link farm pointing to numerous domains, many of which appear to be compromised WordPress sites or use disposable hosting. These links likely serve as a distribution mechanism for phishing or malware, leveraging the PDF format to obscure the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://dubigroup.com/admin/fckeditor/editor/filemanager/connectors/upload/file/82718077953.pdf In PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608361b80ba9d---60555654405.pdfIn PDF document text
    • http://songdolandmarkcity.com/userfiles/file/50238881372.pdfIn PDF document text
    • http://mvhs78.com/clients/68382/File/61479918768.pdfIn PDF document text
    • https://braindevelopmentmaps.org/userfiles/files/49174933046.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/vc24j3p5pqmd13u9beuh8ik9d5/34380866500.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/2926073553.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/34e9aa0309b3c0312df4cfb71e2955c4/10380906976.pdfIn PDF document text
    • http://zonwering-belgie.nl/ckfinder/userfiles/files/13116381379.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/5a1028b12ebbd0b68c4de2b83ff94e99/xazizibotubuge.pdfIn PDF document text
    • http://merrygoldholidays.com/ckfinder/userfiles/files/xibonez.pdfIn PDF document text
    • https://expomediainc.com/upload/file/kasutediruvumowamajuxet.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0050893fe7---55970521724.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/3aabdb2ca7c1744916cad36d91a62d15/5218486267.pdfIn PDF document text
    • http://siembra.me/uploads/files/goropikewesodawa.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/52155bf60b7783e542b6aa0f8228b0a6/94478522968.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085f316a3fdf---wibipazelonojizesajam.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16099315615e18---95252108885.pdfIn PDF document text
    • http://kengosushionlineorder.com/uploads/files/jujizuzedilewidinaj.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/timowukunofijudepax.pdfIn PDF document text
    • https://onlineadda.net/ckfinder/userfiles/files/gesimekomexoxuwus.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/10088a47d7996d69a0579ba8c8e49ca8/kegorezafoxutolor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=msongo+wa+mawazo+pdfPDF 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_off0000bcb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d4d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D0 10512 bytes
SHA-256: b32269e49aa8dc9f3552ded35f31c7201957a22c8120aed696aefe7a534648ea
font_02_sfnt_off0000ec93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC93 16696 bytes
SHA-256: 61da5f72c6dbe64b6ccc3c437333aae099ad0a2b2bada20cd1324b428f71e531

Open this report in the interactive analyzer, or submit your own file for analysis.