Malicious PDF — malware analysis report

Static analysis result for SHA-256 b45bf7fb686ed773…

MALICIOUS

PDF

70.7 KB Created: 2021-09-17 17:31:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 12d5bd215c5a2fc33f5687f76c57c9bf SHA-1: f1b3a8875bdbb34b10ebe2d912e1353daa69c7cb SHA-256: b45bf7fb686ed773d0815e3d558cf346f83cbb9716599191139fc756e9623f1b
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and links to compromised CMS upload storage, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attack pattern involving directing users to potentially malicious content hosted on external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://allytemp.ru/uplcv?utm_term=among+mod+ios PDF link annotation
    • https://www.oalysa.cz/ckfinder/userfiles/files/guvafenipoworilela.pdfIn PDF document text
    • http://papierplus.pl/userfiles/file/garaxiraluxi.pdfIn PDF document text
    • http://hotelalbicia.com/userfiles/file/riwax.pdfIn PDF document text
    • http://qualityspices.in/ckuploads/files/93519211086.pdfIn PDF document text
    • http://sakem.org/userfiles/files/zubukadogud.pdfIn PDF document text
    • http://rehahomecare.com/upload/editor/files/dosifudeg.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b901f9db6b---rodukodu.pdfPDF link annotation
    • http://qhchemicalsfeed.com/upload/files/kakub.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1613b433fefd3d---78736166064.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/0c3e9348d1265db1a78f890e5d0ee23a/33678430660.pdfIn PDF document text
    • http://xn--2o2b17g32e8xisqq.com/userData/board/file/58135793994.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c0a142143c---sibadididawo.pdfIn PDF document text
    • http://zopos.zohukum.com/ckfinder/userfiles/files/40972408544.pdfIn PDF document text
    • http://kleinschaden.expert/userfiles/file/58809575252.pdfIn PDF document text
    • http://sjatupornservices.com/file_media/file_image/file/42620486912.pdfIn PDF document text
    • http://gleb777.com/fck_upload/file/safot.pdfIn PDF document text
    • http://medical-1669.com/userfiles/files/zivixukideninobuxaf.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613620c2eab0c---19119211885.pdfIn PDF document text
    • https://www.displaysdirectaustralia.com.au/application/third_party/ckfinder/userfiles/files/31031650567.pdfIn PDF document text
    • https://canoe.ro/Extras/ckfinder/userfiles/files/gidivipe.pdfIn PDF document text
    • https://stmpallet.com/ckfinder/userfiles/files/21358966931.pdfIn PDF document text
    • 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_off0000b718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB718 15884 bytes
SHA-256: 0125d3ff099d627dc8046e64aa043a80386537e1025047845ad72c95c60ab0c0
font_01_sfnt_off0000dfa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA9 10036 bytes
SHA-256: c3dc69572181323162d2c5d1824818cd56df2cdb9f3b83c3a13794124161282b
font_02_sfnt_off0000f5a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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