Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fdeb0bd2caa55c0…

MALICIOUS

PDF

75.0 KB Created: 2021-03-12 17:09:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: cb26ffab70852fc37e0aabadc4d371b5 SHA-1: a776b6e018091c116b49053a53979b98aace5597 SHA-256: 5fdeb0bd2caa55c0cc491e72c02172412c57c035e5cda17348ec9cd691c23c0a
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'dafemum.ru'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL and the document's likely intent to trick users into clicking it suggest a phishing or malware distribution attempt, consistent with Spearphishing Attachment.

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dafemum.ru/123?utm_term=aadhaar+data+update+form+in+gujarati In PDF document text
    • http://zitugaxusi.mygamesonline.org/whirlpool_accubake_gas_range_oven_not_working.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404723/normal_5fcb0f7735004.pdfIn PDF document text
    • http://thefortykuti.com/kukobakiruripa9dtx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448540/normal_60301d8e0a2b8.pdfIn PDF document text
    • http://sorulaxawo.iblogger.org/memrias_pstumas_de_brs_cubas_filme_completo_hd.pdfIn PDF document text
    • http://fodekofuxuvum.sportsontheweb.net/fewufikofit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410714/normal_600007b7cdce3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405895/normal_5fdf06149a039.pdfIn PDF document text
    • http://vorecan.space/kafufifelo9bah.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484363/normal_6041767617b88.pdfIn PDF document text
    • http://foxiduwanati.mygamesonline.org/71077201583.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448735/normal_604aef224ca85.pdfIn PDF document text
    • http://kidiwutimako.mygamesonline.org/authors_purpose_used_in_a_sentence.pdfIn PDF document text
    • http://nuverlites.online/i_am_waiting_at_the_counter_for_the_man_to_pour_the_coffeeghrgz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416136/normal_6040ee18d0b59.pdfIn PDF document text
    • http://ladiluvame.mypressonline.com/what_is_the_average_value_of_f_on_1_6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393041/normal_5fce9042b6dfe.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/peveziwoguxuzam/76049549529.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/les_autodafeurs_2.pdfIn PDF document text
    • http://dawifugoxumevej.rf.gd/27452478857.pdfIn PDF document text
    • http://soxegegafaroja.epizy.com/how_to_treat_my_dogs_arthritis.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/anacalypsis_volume_2.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/gajuwikagejeniwi.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/4471686601.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_off0000e995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE995 5308 bytes
SHA-256: b63a9bd77b5fe35c33bad6d9555d2f4d38c00cb4c97d0fd2562079893689060e
font_01_sfnt_off0000fb87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB87 10416 bytes
SHA-256: e85940103c36de29c95cdb68775c2af28d807fa7277523efd1eccade1a9ebf41

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