Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae281e253fdbdf7a…

MALICIOUS

PDF

70.6 KB Created: 2021-08-21 04:50:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 56af4c688de7f5f5cca25281da4841bb SHA-1: d1b29ce710647f9e2ef008a61cfbd6614d3ac7ba SHA-256: ae281e253fdbdf7a3d55b1a45474196c245161b91496429abdf7b458f43d1019
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. ClamAV detected this file as Pdf.Phishing.Trojan, indicating a phishing or trojan distribution intent. No scripts were extracted, but the structure and URL patterns are strongly indicative of a phishing or malware delivery mechanism.

Machine Learning

  • Nyx PDF Classifier clean score 0.2381

Heuristics 5

  • 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
  • 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://wastran.ru/uplcv?utm_term=kis+kisko+pyaar+karu+full+movie PDF link annotation
    • https://koratspring.com/upload/file/43554473702.pdfIn PDF document text
    • https://bonafideonline.com.ar/wp-content/plugins/super-forms/uploads/php/files/33d800535d0ec8ade6ff6b4be9664100/ludoraxarosegomirigu.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/6jtdbo03t9714n54pq78cpvjs5/wobos.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/668ce74416eaad5d0a454e33e001100a/72978585659.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/jimemakobexususejon.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1606f29785be08---kanitokolesuvuxenuzeme.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/3011727976.pdfIn PDF document text
    • http://www.cenlafilm.com/siteuploads/editorimg/file/16252692897.pdfIn PDF document text
    • http://kidneytexas.org/clients/861060/File/xunujoxakovuriruvivixok.pdfIn PDF document text
    • https://www.dooleysnaturalgas.com/ckfinder/userfiles/files/21001180437.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/nalexebako.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/vnmabm53mkese5kdnq2r047j10/digexapujakuzev.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/31f993f875204e7cdc664a000ac321b5/11060629109.pdfIn PDF document text
    • http://silesiacapital.eu/data/file/navigosetuzexovuvise.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/4e569abde23c70b06619a45cb5016422/tuworexuluwotakoriwagad.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abe6e5a88cb---92261244148.pdfIn PDF document text
    • http://falerisztika.hu/tmp/16379247652.pdfIn PDF document text
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/dowisixigemixov.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/ofe22c39kfbs82v58g9029lua5/85596821258.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100555466fa0---86626202054.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160772a6900c52---zanuzugojimuwaxitemof.pdfIn PDF document text
    • http://gestaocipa.com/public_html/Imagens/file/wukufuzevoxovaror.pdfIn PDF document text
    • https://reklama71.ru/upload_picture/paxirosezase.pdfIn PDF document text
    • https://nhadatonline24h.com/Images_upload/files/jixuzamopositi.pdfIn PDF document text
    • https://edinburghpools.com/contents/files/13129892922.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/0f41769fcd5df4f10d341ea249940b89/bupurabodogupunegel.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE889 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000100a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A0 10680 bytes
SHA-256: 6efbfd23f0f986c0565c73225f1304026b2f02b1548413d8cb79826900765b66