Malicious PDF — malware analysis report

Static analysis result for SHA-256 418f752bee70fb9f…

MALICIOUS

PDF

70.6 KB Created: 2021-09-06 13:30:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4c3ea882f3acbc782aa15eb0f01062e5 SHA-1: fab6fdcc5781b9f7feac0283d48187706b597369 SHA-256: 418f752bee70fb9f4a34e89cd9be7e79fed0d4e6bc874b2101ce14e9bd5558a3
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The file's structure and URL patterns are consistent with a spearphishing attachment used to lure victims to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7700

Heuristics 5

  • 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
  • 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://web5gstore.com/Files/files/nijugabefikazaresanokilo.pdf In PDF document text
    • http://elandtour.com/FileData/ckfinder/files/20210904_8E0A6A8B40122A84.pdfIn PDF document text
    • http://bora.su/ckfinder/userfiles/files/gakamitopajevod.pdfIn PDF document text
    • https://fajanav.com/aym_image/files/numifev.pdfIn PDF document text
    • http://bestorkate.com/uploads/ckeditor/files/novixezagori.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/7df50343b2439089b8ae8a5410d887d3/11899799194.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16112520f416c7---35217606028.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/36d70f3ce26c3a53cb41d5e037c9f7ba/woloroduxi.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/acu5dtr22g3emq0bhqdqh4spa7/49168328190.pdfIn PDF document text
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/33620789718.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/9qvddc8t5p2ipn40j2djt8jqh1/41442754546.pdfIn PDF document text
    • http://akpanlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/15361009152.pdfIn PDF document text
    • https://retrofitoman.com/ckfinder/userfiles/files/madalifuwaronamutoguvonew.pdfIn PDF document text
    • http://workcoop.org/fckeditor/userimages/file/20210528041543.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/cf10efcd28d22d6197a419d2d1a92c68/68741396326.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/jojemasafivevib.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e9495d9804---tatesajo.pdfIn PDF document text
    • http://seteo-dechets.com/images/file/veruven.pdfIn PDF document text
    • https://speculatio.in/ci/userfiles/files/39590299253.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161242afe24f3f---raduri.pdfIn PDF document text
    • https://keepingscore.org/userfiles/file/lutotososexenofinemaze.pdfIn PDF document text
    • http://baoveantam.info/upload/files/nerenir.pdfIn PDF document text
    • http://retrievers.su/ckfinder/userfiles/files/vegavaxapapizovujupopos.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/27558587908.pdfIn PDF document text
    • http://daisytalavera.com/userfiles/files/19996948513.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=tenergy+lipo+charger+manualPDF link annotation
    • 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_off0000d8e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E0 17200 bytes
SHA-256: 9f4cca9a0eee3bdc26f79085eacfa2dc712c3c60b2cfdc1ca87c2fb1e2378c84
font_01_sfnt_off00010532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10532 10732 bytes
SHA-256: 932a02d513a9ec374098193a9fbdaf8617730eb53eaf123fa1117255712bcd9f