Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bcfe951cb01d3e2…

MALICIOUS

PDF

80.0 KB Created: 2021-09-09 22:04:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9e5dff8412a431d1a6568cee4447402f SHA-1: dc11424600dc327e5fc442fb9a4c13e916664f77 SHA-256: 3bcfe951cb01d3e2d34d8ecc1f0f46c98b88aac0afb5d45e6997cc53a2cc4ac3
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 http://ukwoodrecycling.com/userfiles/files/57882075695.pdf In PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/202196730511224.pdfIn PDF document text
    • http://quantri.thaisonpalacehotel.com/upload/files/86151952431.pdfIn PDF document text
    • http://sofar-france.com/userfiles/file/5579682632.pdfIn PDF document text
    • https://nibrasimansch.com/userfiles/files/repubijisuxunufubum.pdfIn PDF document text
    • https://yourdentist.ro/app/webroot/files/userfiles/files/85609711945.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/a2c244fc61426302acc36b1ab59fd49e/xakikajesawi.pdfIn PDF document text
    • http://xn----itbbfrdrdbd4bgy6gi.xn--p1ai/webroot/files/files/81424179716.pdfIn PDF document text
    • http://dragonspond.com/uploads/files/vinurewaru.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613284bc2d721---mopumosala.pdfIn PDF document text
    • http://www.frank-diagn.hu/userfiles/files/wikebefidovebijodufi.pdfIn PDF document text
    • http://happyhanool.com/ckupload/files/fakozitafaze.pdfIn PDF document text
    • http://angelascanu.it/uploads/file/lipedemenudofi.pdfIn PDF document text
    • https://typeone.com.my/ckfinder/userfiles/files/wezitope.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/4811667ac3af00727357d966cbaee6e8/lujez.pdfIn PDF document text
    • http://energy-labels.nl/userfiles/file/nutipeg.pdfIn PDF document text
    • https://rodolphe-blanchet.fr/Rodolphe/fckeditor/file/42027992617.pdfIn PDF document text
    • https://tramhuonghanoi.vn/upload/files/76290058518.pdfIn PDF document text
    • https://ifbscalidad.eus/files/galeria/files/59228408485.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/49821684186.pdfIn PDF document text
    • https://hiroyoung.com/data/files/vowebiboxovukexa.pdfIn PDF document text
    • http://bsp-oblspl.org/ckfinder/userfiles/files/kikegefizav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=removing+cookies+on+androidPDF 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_off0000d0f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE903 18400 bytes
SHA-256: 7a2d25f130bb36787cda948da2563628657d10c14134fd0f84d73234adafe21c
font_02_sfnt_off00011857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11857 10772 bytes
SHA-256: 11c7b7faffdd917e59b43d03dac7723f5356e522cf2aaf1468a151d6c1cfe48d