Malicious PDF — malware analysis report

Static analysis result for SHA-256 9994c3592f56f379…

MALICIOUS

PDF

73.5 KB Created: 2021-06-21 18:15:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 78a6f4a041b3d721df77fed448f469e9 SHA-1: 0d84a9632001b3a16d87474ab87ceae3bf8c86fe SHA-256: 9994c3592f56f3796f1801475667ca4a6af883461d5f14f4441e76139c107577
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a lure related to '8 ball pool line hack 2020' and includes numerous links to external PDFs hosted on compromised websites. The ML classifier strongly indicates maliciousness, and the presence of link farms on potentially disposable hosting suggests an attempt to distribute further malicious content. No scripts were extracted, but the overall structure points to a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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://alarrabnews.com/images/content/content/file/57757778363.pdf In PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/0c1b5ac8c6a8de0e656fadbd72bc2125/janodaraxalagowaseromu.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608f784e3e6dd---33798290769.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608413fedd03b---gideliromibazume.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/7e720cba61b04de020ae89353aa574c9/4067662124.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16083ebecb1dbf---1875132170.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/8edce71da6afde9517702fef7b65d693/wonosotamijuges.pdfIn PDF document text
    • http://haohanlegend.com/Uploadfiles/files/selovovu.pdfIn PDF document text
    • https://ehotelgateway.com/bot/ckfinder/uf/files/68482429038.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b267f97d240---21772058319.pdfIn PDF document text
    • http://uptownchantilly.com/uploads/files/mabovelefe.pdfIn PDF document text
    • http://royalwedding.jp/images/blog//file/34950496457.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba260564724---5839935869.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/fofakibazulosetesur.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070cc224418e---mebogamefedunarivoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=8+ball+pool+line+hack+2020PDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e22b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22B 5324 bytes
SHA-256: 6e2cb299ddb1b90349c62bad4d0148a61c12d251bbdb5ae7f83078f14e6e187d
font_01_sfnt_off0000f441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF441 11304 bytes
SHA-256: 7c502165cb232c2dbaf051330ef7afbac2e28ed580bb3b01894125dd8720cdf0