Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7aca26703e027d0…

MALICIOUS

PDF

34.2 KB Created: 2020-11-05 14:28:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 18f043bca013d189e7f898b8158f530c SHA-1: 1693c141ee7cf2eded3f25a0498c4d33ca375148 SHA-256: a7aca26703e027d09b706f1d48d823ccbf9ac73bdf0a349141c18213ad1ecd78
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which is identified as a malicious redirector designed to harvest credentials related to Google account recovery. The document body, though heavily obfuscated, contains the URL and a keyword suggesting a password recovery lure. The presence of numerous external PDF links further indicates a link farm intended to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ttraff.club/123?keyword=recover+my+google+saved+account+passwords In PDF document text
    • https://cdn-cms.f-static.net/uploads/4402932/normal_5f921287a1768.pdfIn PDF document text
    • https://sakolepak.weebly.com/uploads/1/3/4/5/134588428/xofuxaputenetol_bifowowidulez_poxubolitumava.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373986/normal_5f9431d3533d5.pdfIn PDF document text
    • https://wojedebaroz.weebly.com/uploads/1/3/1/6/131637691/gomigitixatew.pdfIn PDF document text
    • https://derodaju.weebly.com/uploads/1/3/1/6/131606282/ruzaso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365575/normal_5fa1718ac29d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375357/normal_5f8962748d78c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365547/normal_5f88c8edc77e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387240/normal_5f926d689427f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/53370561840.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/11602493493.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000457b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x457B 5656 bytes
SHA-256: cafe6771b31170efcedfe5f034db6b08e10acc53a5af9eaefc6522f1951ff119
font_01_sfnt_off000058cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58CB 10268 bytes
SHA-256: 95374c98d020ed8e43e21024d866a1ce59ad7564298fb0f6cb3fd94617402e38