Malicious PDF — malware analysis report

Static analysis result for SHA-256 47ef5a0bc683fe27…

MALICIOUS

PDF

69.6 KB Created: 2021-03-06 15:44:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: b04d9857fe726553b9da683193858948 SHA-1: 9f65f6b1040e0c4dd9f2dc5ad7a7d89039cec58b SHA-256: 47ef5a0bc683fe27953121cbeb9868381be94122e2531c00cc4603d58ade80e4
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection strategy. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://jumiwimov.ru/wix?keyword=curriculum+central+dallas+isd PDF link annotation
    • https://waretopaze.weebly.com/uploads/1/3/4/5/134529701/kapif_rowidip_betuj.pdfIn PDF document text
    • https://sifegofariwe.weebly.com/uploads/1/3/1/4/131437131/6240661.pdfIn PDF document text
    • https://kulabukotijol.weebly.com/uploads/1/3/4/7/134703535/musuvig-zugepatumape.pdfIn PDF document text
    • https://donimafu.weebly.com/uploads/1/3/5/3/135395233/sizudana-weberidis.pdfIn PDF document text
    • https://sinipipa.weebly.com/uploads/1/3/0/8/130874509/e1fc64e52370.pdfIn PDF document text
    • https://fagugirawax.weebly.com/uploads/1/3/4/3/134388021/jefopijelusir_fibuguto_roraru.pdfIn PDF document text
    • https://nirejabepifu.weebly.com/uploads/1/3/4/2/134266024/2a6efa9831e.pdfIn PDF document text
    • https://gufogirim.weebly.com/uploads/1/3/5/9/135967500/ddfac9c.pdfIn PDF document text
    • https://fovivijidilel.weebly.com/uploads/1/3/4/8/134888041/9271938.pdfIn PDF document text
    • https://tesurupijirixu.weebly.com/uploads/1/3/0/8/130813669/tezavivibin.pdfIn PDF document text
    • http://pikogoxo.iblogger.org/realpolitiks_how_to_increase_gdp_per_capita.pdfIn PDF document text
    • https://jitifawe.weebly.com/uploads/1/3/5/3/135327084/1880564.pdfIn PDF document text
    • https://xivovawa.weebly.com/uploads/1/3/4/8/134875493/teluvosawikimugerila.pdfIn PDF document text
    • https://nesojikav.weebly.com/uploads/1/3/1/3/131398336/zefaramenexuta_rubeki.pdfIn PDF document text
    • https://sezulozag.weebly.com/uploads/1/3/0/9/130969806/bamagemevaxe-fijukibuxu.pdfIn PDF document text
    • https://gitumakiwu.weebly.com/uploads/1/3/1/4/131437138/vuzexijetawofu.pdfIn PDF document text
    • https://nafuxiba.weebly.com/uploads/1/3/4/0/134097784/a7a136a072c6.pdfIn PDF document text
    • https://fupopafesuz.weebly.com/uploads/1/3/4/4/134443157/7696910.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/gebukil/gasezisizobaguzulat.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/jivukegelakox.pdfIn PDF document text
    • http://gimukukuzape.epizy.com/believer_lyrics_whatsapp_status.pdfIn PDF document text
    • http://bubevaziper.rf.gd/2002_ford_explorer_wont_start_fuse.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/xaxixiboru.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/ganudimakulowigizatadab.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/asio_link_pro.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_off0000d5a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A1 4992 bytes
SHA-256: 08a43fc02b76ee9979011bd09bd642920e71db5de9cb651e3b681c54530844de
font_01_sfnt_off0000e676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE676 10112 bytes
SHA-256: fb5bd76dd9f350a45ae26b55ed8b17a60fffd2f3f701023b52db67a63f312583

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