Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1c2b47faab15860…

MALICIOUS

PDF

67.5 KB Created: 2021-03-30 17:31:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: ea56a2ad68371a38aba41d487108b7ad SHA-1: bd61a4a19991f9e8fc4444ffd7e267530bf7fb16 SHA-256: c1c2b47faab15860e3ec7f0fc0ade71735cd1f963b7c68eddc2ea15b8952a0e7
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to a suspicious domain ('midufefew.ru') that is likely used for phishing or distributing further malicious content. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a coordinated effort to direct users to potentially harmful sites. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://midufefew.ru/award?keyword=french+arabic+dictionary+pdf PDF link annotation
    • http://vulefuxudonad.22web.org/kupixawipari.pdfIn PDF document text
    • http://byseles.xyz/13645873387vqe8f.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzufoxo/SghdjiU/72912587004.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • https://cdn.sqhk.co/zuwiwejagub/VhjPa4L/44742627865.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • http://gerda-msk.ru/934626261535gtol.pdfIn PDF document text
    • http://vafutixon.22web.org/92507036798.pdfIn PDF document text
    • https://cdn.sqhk.co/bidogefapo/ghaib5h/snake_vs_block_how_to_play_color_mode.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1a73feee-b327-4bc5-ac54-9d367b44a425.filesusr.com/ugd/226baa_fca17b87b9454ed1bbb555d7b6cf53bc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jijumupade/95934941089.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/vopuwava.pdfIn PDF document text
    • https://dacf5b84-f80e-4bd8-bb7f-22aad20a1cd8.filesusr.com/ugd/285be4_9766e9134d3a4019b5e39dc914781c36.pdf?index=trueIn PDF document text
    • http://foraxevub.rf.gd/zidijolopidoz.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/87581864519.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/logo_barcelona_dls_18.pdfIn PDF document text
    • http://vutafinaragod.rf.gd/blanche_neige_sorciere_transformation.pdfIn PDF document text
    • https://s3.amazonaws.com/sogovekevi/fountas_and_pinnell_abc_chart.pdfIn PDF document text
    • https://c6de0af5-2a4c-46da-924c-839bccb102c6.filesusr.com/ugd/5f1f0f_4eea705c31d6426bb59654d70554cf27.pdf?index=trueIn PDF document text
    • http://fekiboxupikus.epizy.com/appassionata_secret_garden.pdfIn PDF document text
    • https://724418e0-3ace-43c1-abd8-628b4820fc71.filesusr.com/ugd/6df952_097b45ea8f14472b8a4ed941b82efb54.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/everfi_module_6_final_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/dr_seuss_free_book_bag.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_off0000cb1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB1E 5228 bytes
SHA-256: 90d34796e4438e57933d74c8048aa2569880f4bd2a519616bf818b9d5a9b904a
font_01_sfnt_off0000dce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE9 10676 bytes
SHA-256: 88217deeccc9bfed316b5c6e8912c54879a63cb9408de76687f1fa8666b1ff2f

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