Malicious PDF — malware analysis report

Static analysis result for SHA-256 92776ae89c6da9d9…

MALICIOUS

PDF

79.5 KB Created: 2021-01-15 03:26:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 29d310cbcbbc00df724486dc28cdd7df SHA-1: 2cbebc78503efd119e4662de57a3eed95d17d4f7 SHA-256: 92776ae89c6da9d9d6f3e8108ba2e13814027a27cca92f21961dcbce663ffdb0
214 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. The presence of a large number of external PDF links suggests a link farm designed to distribute malicious content or phish users. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a likely attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cctraff.ru/123?utm_term=i+wish+i+could+be+the+perfect+daughter+from+moana In PDF document text
    • https://static.s123-cdn-static.com/uploads/4415519/normal_5fe29406cdb09.pdfIn PDF document text
    • https://site-1196795.mozfiles.com/files/1196795/59716925777.pdfIn PDF document text
    • https://kiseridebajesa.weebly.com/uploads/1/3/1/4/131408791/rupebisarob.pdfIn PDF document text
    • https://runumoviw.weebly.com/uploads/1/3/4/8/134854062/022cd.pdfIn PDF document text
    • https://dewajijivixire.weebly.com/uploads/1/3/4/6/134638152/73665ed.pdfIn PDF document text
    • https://site-1083673.mozfiles.com/files/1083673/nizolubabagemejigalupur.pdfIn PDF document text
    • https://tazejoga.weebly.com/uploads/1/3/1/3/131383942/160d49b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414486/normal_5fa433e97d523.pdfIn PDF document text
    • https://gatofofuxiwiv.weebly.com/uploads/1/3/4/2/134265530/nixumafirivi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xazarujokemus/37137406479.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/bitawapebinazopima.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/54568155481.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/jutujov.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4C4 13248 bytes
SHA-256: 8939c411f69200f1d5996e0f7a698236f1522092ba453e2d7ee4ff3e4791be71
font_01_sfnt_off0000ef12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF12 5620 bytes
SHA-256: f9746b1de283297e308c23b26f4acfc144ec073c38307a04b52117d54a12417d
font_02_sfnt_off00010206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10206 9528 bytes
SHA-256: 1799986923a1dd32335901c93262d78bbe51485cdd3e87b02fdcf4af9a7d70fb
font_03_sfnt_off000122a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122A8 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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