Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd33fef98b7b3721…

MALICIOUS

PDF

87.7 KB Created: 2021-03-26 16:43:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: e06001802a58d1cc6ef1fcb48d996374 SHA-1: 5a88205908b75cef662068c48a263faf9264c635 SHA-256: bd33fef98b7b37215cd1bd967d950df1edb2ca042157445348967ceb9d96cba8
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO spam or link farms. One of the primary URLs, 'https://leonvi.ru/award?keyword=auxinas+en+plantas+pdf', suggests a lure related to plant hormones. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or a trojan delivery mechanism. No scripts were extracted, but the PDF structure itself is indicative of malicious activity.

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://leonvi.ru/award?keyword=auxinas+en+plantas+pdf PDF link annotation
    • http://walolexokesufa.sportsontheweb.net/dagatosajivujiduxada.pdfIn PDF document text
    • http://tevutubiwij.getenjoyment.net/46987543363.pdfIn PDF document text
    • http://sixesijilolun.mywebcommunity.org/wobinawazunebiwi.pdfIn PDF document text
    • http://fegivate.medianewsonline.com/casablanca_film_analysis.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/jebokizez/how_to_use_logitech_k400_with_lg_smart_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/epileptic_seizure_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/megujobemegor/solomon_and_sheba_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/cardiopulmonary_resuscitation_american_heart_association_guideline.pdfIn PDF document text
    • https://07d68bf2-0661-47e2-9ffe-eae068a071af.filesusr.com/ugd/fef806_b578bff96c3f40edb17847c1027c5dd9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bomupi/2214060470.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb2ad336-43e8-4899-a8cc-816cfc83c43e/mepokewitomes.pdfIn PDF document text
    • http://dapibudajemuk.atwebpages.com/visa_application_form_to_enter_japan.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/zubusuwanijumeloxobir.pdfIn PDF document text
    • https://s3.amazonaws.com/farokof/before_the_industrial_revolution_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/84188997469.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/45370734986.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/93383451928.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/67849917334.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/wubexetidokik.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/maplestory_legion_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/74674997069.pdfIn PDF document text
    • https://944456f3-75eb-4cd6-bbfd-656b3713ada1.filesusr.com/ugd/2c8d66_658fd7cdd730484ab582ef3202c83572.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/70263042101.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3adaaef7-79c6-4b9c-95b3-424f8c585591/54652012785.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14092b13-33fa-485b-a3da-ebda7221f8c2/bogoxupuwaj.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_off000110d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D7 4996 bytes
SHA-256: 6843da358bb8ef239ca936624000c782e448d8cc76c5b43760141fefde00f326
font_01_sfnt_off000121ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121EF 15868 bytes
SHA-256: d928a1c3205c4ad1194d0116fea585718ae5379c539c93a53d24b748e108080f

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