Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c4dcdddc9ff6a81…

MALICIOUS

PDF

101.5 KB Created: 2021-07-14 01:26:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: c5987731f2c5adaf9e8b13a57a6be48f SHA-1: 3cc65bf142508a7227065d253ea4ea72f224d2e8 SHA-256: 2c4dcdddc9ff6a81cfa9bf7abc6de2631e03620d8b8e528238115cfeca5a9031
156 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains a link farm pointing to compromised WordPress uploads and other disposable hosting, suggesting a phishing or malware distribution scheme. The document body is unreadable, but the heuristics and numerous URLs confirm the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://nolimitscenter.be/peausitive/images/FCKeditor/file/morozunasami.pdf In PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/cldmelq9fud3ddulb6f5deiinl/fakamax.pdfIn PDF document text
    • https://rajatotogroup1.com/contents//files/44021933504.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1607aded2d03dc---27527296243.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b5fe403915c---65870809784.pdfIn PDF document text
    • http://www.hausbaumesse.at/ckfinder/userfiles/files/66511620678.pdfIn PDF document text
    • http://aweibel.com/Photo/file/xisifa.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16098c87151d9e---xekirobigenarifosuwumi.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd2345403a---taxebetapetixopobubumu.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/kdvp61eajdi2utlpv24cdtgjc3/zigebam.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607305f8709c3---36764321960.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608b809a05f7b---99136337309.pdfIn PDF document text
    • http://mrsjamesirvine.com/clients/82887/File/48185587161.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/5799c1b214de6b7d20e69d49cfd81c88/5397605159.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/zotukasato.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16072aa9539301---68082207322.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/65efe6b3eede48cea2062dc144f16959/52066579459.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160eddebb80c7c---xusewutapiwugola.pdfIn PDF document text
    • http://ankamet.com/userfiles/file/kutawewemiji.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a75e94f593---pejevekofexibixutaka.pdfIn PDF document text
    • http://wwpokebar.com/uploads/files/ruvalogofoxuradalatuma.pdfIn PDF document text
    • http://www.euro-fly.eu/userfiles/files/pezuwowagaf.pdfIn PDF document text
    • https://egca.fr/userfiles/file/9962333987.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075dd0ed3cbe---37828611893.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=list+of+historically+black+collegesPDF 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_off00012913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12913 17920 bytes
SHA-256: 34a8f8485848b0d787908d261e60868b3c55e99b5034d9a7c8c7c01aa349e097
font_01_sfnt_off000157ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016fc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FC4 10816 bytes
SHA-256: 9bd989ac8571001729da5192f534c7ea9e5682dad6914cca22ea2e30f90aa03d

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