Malicious PDF — malware analysis report

Static analysis result for SHA-256 896d14821084b8bf…

MALICIOUS

PDF

132.7 KB Created: 2021-07-17 10:19:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 47112617049ce24621f93fcc607d5062 SHA-1: ec92132ac5aebd73b732bde6d62aee5910cb2a3d SHA-256: 896d14821084b8bfc8a4fdf5e407c9bcf6ba578f38178229b4b7da89d8172b1d
176 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to compromised WordPress installations and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160af59ad0c4c6---xawexubazudefatugolefaji.pdf In PDF document text
    • http://alliance-ltd.com/userfiles/wutupaduvetatizixabewuz.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cea424d8b4b---fufivevagenumajemidoga.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/24772407780.pdfIn PDF document text
    • https://creativitagh.com/pevron/www/img/file/23260070612.pdfIn PDF document text
    • http://duancanhotot.com/upload/files/sonobareremujagebuzonirow.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/02387a68be21a3d8c3ab59e9c5a8e923/31301410067.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/xobosafogutokukotebu.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d71cb04d07---fipobodexi.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c687d774bbb---26718514873.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/a060c291b085e301c5f17dc8f4f220c1/56232804222.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8d2837dc4---kidowukexebukuxujubuz.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/10e7fa78dd180acf9fb53ce4f5ed27c4/zewuwezonenikupilaxafad.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/84bb195a85c34e2bd064e4c149e32d81/72461920109.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/25778269550.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/15494885526.pdfIn PDF document text
    • http://kleinschaden.expert/userfiles/file/78850309450.pdfIn PDF document text
    • https://chezgregoire.fr/userfiles/maxawa.pdfIn PDF document text
    • http://yogo110.com/userfiles/file/gowejevinezirax.pdfIn PDF document text
    • http://aczelzalog.hu/tmp/wotegizonoge.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c914ea4eab---85013465462.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/9344ec54dda55d8b60a30aadc5c99ee8/bemerejareb.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1609c3c713ab8f---miwewi.pdfPDF link annotation
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d96703ecb99---xogofifakadokoze.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=sisters+of+st+joseph+third+order+of+st+francisPDF 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_off0001a4fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A4FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001bd0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BD0E 18656 bytes
SHA-256: e7957919131d294cea3bb4e9a66a66464ce88dcad0084b10eb02174680e62878
font_02_sfnt_off0001ebe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EBE3 10876 bytes
SHA-256: 39fb096deeb0dc41a37f9f0c9828e1e70e5535a7c2e4ec021a5e9fb37bc966da

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