Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bc72132df48802e…

MALICIOUS

PDF

80.1 KB Created: 2021-09-14 13:15:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 48395acef40d3c2eed4ebd65e7c5210b SHA-1: 9c12ff2aa9730b0ebc5e9400fb05de1eef9868f3 SHA-256: 3bc72132df48802e090d8be2e33d859e07d6043d6f5b7d65ab859191b4b2638c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to domains that appear to be compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to direct users to malicious or compromised sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://synergyproperty.com/images/files/96803291670.pdf In PDF document text
    • http://bloodfaces.de/attachment/file/duxero.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/6vqspins3c6l95uoo8iatf3hr0/40298779976.pdfIn PDF document text
    • http://bancasemecanino.com/userfiles/files/15294026490.pdfIn PDF document text
    • https://b2bircruise.travflex.com/bot/ckfinder/uf/files/punep.pdfIn PDF document text
    • https://rafaela-motores.com/userfiles/file/51852489411.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210908101811.pdfIn PDF document text
    • https://rtvpuls.com/ckfinder/userfiles/files/8852686929.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613df36e6f097---18403113060.pdfIn PDF document text
    • https://acrgruppe.de/userfiles/file/dakimupebejenidoxi.pdfIn PDF document text
    • https://kccegis.com/upfiles/content/file/20210912052903.pdfIn PDF document text
    • http://youzedu.com/ckimages/files/20210904005044383666.pdfIn PDF document text
    • http://bwemfjhjk.friend-match.com/upload/files/popelibujukufodami.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614038d062f07---7532998847.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1613f36204028e---dezovuwuleno.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cd51f9dc42---51618456958.pdfIn PDF document text
    • http://aktifimmo.lu/userfiles/files/82082973479.pdfIn PDF document text
    • https://gullyracing.it/admin/ckfinder/userfiles/files/85654532201.pdfIn PDF document text
    • http://exima.kr/userData/board/file/3956734669.pdfIn PDF document text
    • http://www.rsvpcatering-ar.com/files/imagesfile/pibenutixok.pdfIn PDF document text
    • https://www.sistemkabin.com/ckfinder/userfiles/files/dosaxoxemumopumarefa.pdfIn PDF document text
    • http://dunakeszi.varosom.hu/userfiles/files/zataxapatodowolobikulo.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/6768f4186a993f73ad362ed5bc95651d/98679694775.pdfIn PDF document text
    • http://www.portaldasfreguesias.com/portugal/vianadocastelo/vianadocastelo/geraz_do_lima_sta_maria/ckeditor/ckfinder/file/fawuwamibo.pdfIn PDF document text
    • http://floramarble.com/uploads/79413057275.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+move+data+from+mobile+to+sd+cardPDF 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_off0000d46e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD46E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ec85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC85 10816 bytes
SHA-256: 1021c4939052ee2fb4c7d46e5bc58c98fe5ccba885da431b5d3ea4d874f57b15
font_02_sfnt_off00010584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10584 17316 bytes
SHA-256: 1de567537c15655da37c44303a12ba9f0670769e8471f14e740259835f1514bc