Malicious PDF — malware analysis report

Static analysis result for SHA-256 2167010117088376…

MALICIOUS

PDF

72.3 KB Created: 2021-06-10 07:02:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e905cb29c0832b54d149470a5fc08982 SHA-1: c3559bea8de3499493902228177ef107fe32a670 SHA-256: 2167010117088376f9877f1aa0365010220fd9ac3203245f9f3f602db81be4bd
96 Risk Score

Malware Insights

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

This PDF document employs a lure of a free song download to entice users. It contains numerous embedded links, many pointing to compromised WordPress sites and other disposable hosting, suggesting an attempt to redirect users to malicious content or phishing pages. The ML classifier strongly indicated maliciousness, and the heuristic firings confirm the presence of link farms and external URIs, consistent with 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://chcial.ru/uplcv?utm_term=i+am+rider+mp3+song+free+download PDF link annotation
    • http://kurier48.pl/files/userfiles/file/32518558206.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073b74af3393---38676817069.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/e02069ca8aeb6ec91c3cb7cf8a6d6477/fatetuzaxaz.pdfIn PDF document text
    • http://worldwidefilipinoalliance.com/uploadedFiles/files/vosumetozugatorakowudewo.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/89kdf33b4t8tdar9855d9e5ec4/16266167297.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/tiraluzofalaje.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c09e59093ec---13436209716.pdfIn PDF document text
    • https://solidpractise.com/files/userfiles/file/18500680473.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/2c43743b075edcd825a9677e4832a910/divurufu.pdfIn PDF document text
    • http://babamoleskine.com/files/file/58957874070.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607099dc642c9---55179193066.pdfIn PDF document text
    • http://absigorta.com/E/file/42961970934.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/74626953769.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16094de521e7da---puvejanitojuxos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF6B 5552 bytes
SHA-256: b13d12a835c578a104c7373ae00d85bf3fdc52644b03489bfc7d1c54b8292810
font_01_sfnt_off0000e245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE245 2712 bytes
SHA-256: 8b3e058e667d736b068672196b577a39cc3075a8dba392c63ced291a34ba6006
font_02_sfnt_off0000edd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD6 11180 bytes
SHA-256: cfbcf7a7dd8d7403ee0a46b075da00858ab16eb22b95f55b50773c8d35432f75

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