Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdff1b0e64396b83…

MALICIOUS

PDF

86.0 KB Created: 2021-03-15 15:22:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 049e0880a415bf4a6345ea57b9081cd7 SHA-1: ed8f910d6f6d8fb0536773d92d265a1018eb95b3 SHA-256: cdff1b0e64396b8362303f1e58b814d35a497577976993a09228c806715fc552
116 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of embedded URLs, such as 'https://resalured.ru/wix?keyword=mesopotamia+word+search+key', suggests the document is designed to redirect users to external sites, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and heuristics point towards a phishing lure, potentially leveraging embedded JavaScript for malicious actions.

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
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://resalured.ru/wix?keyword=mesopotamia+word+search+key
    • http://dujojiwasemob.mywebcommunity.org/90504184704.pdf
    • https://static.s123-cdn-static.com/uploads/4367950/normal_5ff5b46fa89fa.pdf
    • https://keziwoxiw.weebly.com/uploads/1/3/4/0/134042402/659466.pdf
    • https://static.s123-cdn-static.com/uploads/4478422/normal_5fe2ac24cc80c.pdf
    • http://zumepaposakuf.scienceontheweb.net/calendario_anual_2020_argentina.pdf
    • https://static.s123-cdn-static.com/uploads/4383572/normal_6006e10aceeec.pdf
    • https://temizugejifo.weebly.com/uploads/1/3/1/3/131384470/15d69db8bb8.pdf
    • https://cdn-cms.f-static.net/uploads/4471985/normal_604e89aed42f2.pdf
    • http://jawixogu.mygamesonline.org/16025098304.pdf
    • https://static.s123-cdn-static.com/uploads/4445564/normal_5fc5f9c21c638.pdf
    • http://dosijefa.mypressonline.com/can_renal_failure_cause_lactic_acidosis.pdf
    • https://fokikemapusa.weebly.com/uploads/1/3/1/3/131398543/6430085.pdf
    • https://jozufibajas.weebly.com/uploads/1/3/0/9/130969385/79cb50a2715.pdf
    • https://cdn-cms.f-static.net/uploads/4380073/normal_601f29e34498f.pdf
    • https://vewifofuk.weebly.com/uploads/1/3/5/3/135394013/tubukab.pdf
    • http://jenuxijaf.mygamesonline.org/puvuxo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://siwemoxoxawevuv.atwebpages.com/rajidosomugewezelofaru.pdf
    • http://zitasixan.atwebpages.com/what_is_written_law_in_malaysia.pdf
    • http://mojenuj.atwebpages.com/rejebagudejogipodu.pdf
    • http://bebovufuvuji.myartsonline.com/le_petit_prince_summary_french.pdf
    • http://fikelamizogu.myartsonline.com/77990579938.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd98.bin
8071cd4c678541177a808e35003ba2dd217ee59f235212eeadd3d38d6d6fd267		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD98 5544 bytes
font_01_sfnt_off0001106a.bin
8bb3bed0be5c49176cf3436608bdcc5f318e9effd4b9f0a4e4fc40823e8c83bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1106A 10948 bytes
font_02_sfnt_off000135cb.bin
9e1271d681207e96fe60c94df920a27091a957dc81e2614e9e6235263a34fce6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x135CB 16068 bytes

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