Malicious PDF — malware analysis report

Static analysis result for SHA-256 d70ca34e34de086c…

MALICIOUS

PDF

70.0 KB Created: 2021-09-26 18:06:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1fd5844f8af70dfeacdba6eb503882d5 SHA-1: 1ec0f1b2c60bfc3af1b54b112bfdb507bbd85d40 SHA-256: d70ca34e34de086c92136d2121cf8ad6fbbe87a18fed9d15d6a3496324fcfa76
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs, several of which point to compromised WordPress upload directories, indicating a potential phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and URL analysis point towards a phishing or credential harvesting attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://gastrotest.co/ckfinder/userfiles/files/zupolozunufexis.pdf In PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/8l0ff7mi0cdvkehkbq9gqlb4s3/29391768369.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/wagagexakojijuw.pdfIn PDF document text
    • https://doublehair.center/upload/ckfinder/files/31252143509.pdfIn PDF document text
    • https://zzwgjx.com/d/files/32548730824.pdfIn PDF document text
    • https://g55net.com/webpagebuilder/ckfinder/userfiles/files/78479739629.pdfIn PDF document text
    • http://modaxch.com/userfiles/files/norepamalov.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16132d028a67dc---xuvamizoxifodapapegikowa.pdfIn PDF document text
    • https://pmrmhss.com/userfiles/file/28406844759.pdfIn PDF document text
    • https://firesystem.ro/imagini_ws/7945274885.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/egk0bf30a7fuuqv2k83c490nb8/50106000273.pdfIn PDF document text
    • http://sun-eko.eu/files/file/lubofigazejama.pdfIn PDF document text
    • http://expresskaliski.info/file/pixiwebidusatapa.pdfIn PDF document text
    • http://fasson.vip/images/editor/files/guzoj.pdfIn PDF document text
    • http://kingkady.cn/uploadfile/files/rupimorekaputeleti.pdfIn PDF document text
    • https://cartolmania.it/file/sofopibanuta.pdfIn PDF document text
    • http://ericshartman.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wakivowinutevedexipo.pdfIn PDF document text
    • http://upakuika.com/img/file/19931686927.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b6c6eed4c4---70978322630.pdfIn PDF document text
    • http://themadthinker.com/temp/vinney/HTML/userfiles/file/79761748310.pdfIn PDF document text
    • http://bsbcarpet.com/userfiles/file/ziwawipavizavibazefokil.pdfIn PDF document text
    • http://fatimaartwork.com/userfiles/file/97841530663.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=android+recyclerview+animationPDF link annotation
    • https://tes-sys.com/uploads/ckfinder/files/20210914/16316175637047.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_off0000b1a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c9b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9B9 16064 bytes
SHA-256: 7d99e873396666795ff1aca2e6490674b759ef0f25de91d707dac7184b1ca33a
font_02_sfnt_off0000f21e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21E 10608 bytes
SHA-256: 5af0e9304a29bbb99334af5285f2b87d7841ea2db4dab0f25616bfc6d7121f55

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