Malicious PDF — malware analysis report

Static analysis result for SHA-256 e41df27abcd1fb73…

MALICIOUS

PDF

88.5 KB Created: 2021-03-12 06:14:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a7ab77dfb7e75309b19ec6b01686afeb SHA-1: 26e47f3d5802cb50742dbd80fda264007566d707 SHA-256: e41df27abcd1fb7341baf6e6384dd44a575b3752354942173eaba2ce6aadbff3
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. One prominent URL, 'https://pelibifir.ru/award?keyword=negative+effects+of+globalisation+pdf', is directly embedded and likely leads to a malicious site. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • 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://pelibifir.ru/award?keyword=negative+effects+of+globalisation+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481406/normal_603211ed3bc2d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420903/normal_5feaf92989d54.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460706/normal_60001c86d0a25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414848/normal_5fdc333415a68.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/zuxime/30865740169.pdfIn PDF document text
    • https://f55c6975-0091-4942-a106-dc80285e5f9d.filesusr.com/ugd/8a4248_193b894cb65343baa2ca1801d9ab38c6.pdf?index=trueIn PDF document text
    • http://mikusadetov.rf.gd/wafapepijofujapagaf.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/delicious_disney_cookbook_recipes.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/challenge_2_hd_video_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nutanigonu/surviving_sepsis_guidelines_1_hour_bundle.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/gepapekupuxavajari.pdfIn PDF document text
    • https://s3.amazonaws.com/timituvupame/2xu_compression_tights_size_guide.pdfIn PDF document text
    • https://9eaa565e-fb97-40b4-b096-d6760803f699.filesusr.com/ugd/55e2c6_b86de94708c149c2bfd4b7028acb577e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/acronimos_en_ingles_y_espaol_de_informatica.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/bunelemiwiduberibot.pdfIn PDF document text
    • https://104e0e48-a4c2-4a03-8647-06ef64d4e6ac.filesusr.com/ugd/e2c6c1_50175bb8c71e4ee9a09df898c24544a3.pdf?index=trueIn PDF document text
    • https://de99c131-68bf-4271-bcef-cda292486844.filesusr.com/ugd/f5892c_9e421f69794545c0b6a268ca0248fd06.pdf?index=trueIn PDF document text
    • https://7605d98d-8b17-4a41-9383-f5c8d5af9bcc.filesusr.com/ugd/2bed4c_4b1559bd63a04477bb78276bf3baf5d4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/punurum/49961946318.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/coolrom_safe_to.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/whirlpool_washing_machine_and_dryer_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/94853759472.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/90487709619.pdfIn PDF document text
    • http://fipomazuwasa.epizy.com/1237599208.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001071c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1071C 5396 bytes
SHA-256: d8698619726418614ba6dca3028fa7973c9a630baa90c52b3f6b4c531b6f4f96
font_01_sfnt_off0001199f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1199F 10652 bytes
SHA-256: eeab433d8aa4189df1697060729e9ea139ad5470ccef64bb1ad5a6d4925ab843
font_02_sfnt_off00013deb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DEB 16376 bytes
SHA-256: 4954ddec54c61b6acc7eddbac306bc890d05f3afdfcf3ae890c7612da0a7d668

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