Malicious PDF — malware analysis report

Static analysis result for SHA-256 337295f049ffdc36…

MALICIOUS

PDF

79.3 KB Created: 2021-03-23 00:27:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 03caec2a0707452c4793c5baa336a4f9 SHA-1: 982f2378bb5937af81d85fd849e2b59097e4ef9c SHA-256: 337295f049ffdc36450243adae24ad1dade65bb783687cc25e7612772e23eb32
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/strik?utm_term=is+harry+potter+free+on+audible PDF link annotation
    • https://cdn.sqhk.co/sirijunubi/jjsiNia/nigalafesejabepoxadilug.pdfIn PDF document text
    • http://sawuzelipo.iblogger.org/simple_past_regular_verbs_negative_and_interrogative_exercises.pdfIn PDF document text
    • https://mesasijodise.weebly.com/uploads/1/3/5/3/135315214/mizijowaritif.pdfIn PDF document text
    • https://cdn.sqhk.co/konajera/50bhdnk/save_the_light_switch_game.pdfIn PDF document text
    • https://cdn.sqhk.co/woxipepevati/lNdhagg/53346661917.pdfIn PDF document text
    • https://cdn.sqhk.co/tedigedubemi/ihjaDBS/shooter_jennings_fourth_of_july_official.pdfIn PDF document text
    • https://dadojunolibete.weebly.com/uploads/1/3/2/6/132683289/kapuviwatiboreboboso.pdfIn PDF document text
    • http://wogamilip.iblogger.org/benchmarking_adalah.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://05790d5e-93e9-4545-bcc4-99c37f081c18.filesusr.com/ugd/bff4d5_63e2c2a91e214e8db0d41991d081c71a.pdf?index=trueIn PDF document text
    • http://daxukutotexodu.rf.gd/king_james_study_bible.pdfIn PDF document text
    • https://2ddc7431-ff91-46e9-9708-195efd6cc195.filesusr.com/ugd/ffe0d3_388c6ba68ee145e7b8e7496aa16fd423.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bisute/32661385091.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/sakojifuruluvudajagok.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/basics_of_c_language_programming.pdfIn PDF document text
    • http://sulorunak.rf.gd/wupinemazipadeneta.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/betegawun.pdfIn PDF document text
    • https://f18b8dc1-3ce9-44bd-8712-01435d039869.filesusr.com/ugd/b97cba_bffd3c268aca424898b627d37c720209.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/67560689239.pdfIn PDF document text
    • http://kofuzedu.epizy.com/lytton_report_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/76669540087.pdfIn PDF document text
    • https://b3695a61-a5b7-457a-863f-99677d03e0cc.filesusr.com/ugd/f2a82d_f1dfdbf97154454bb641b245cc1d7ceb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/banula/background_indian_flag_images_free.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_off0000f6bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BC 5308 bytes
SHA-256: 6f7281a6f7a43dea97492adb811161e7a09bdb07bd2291eeebbaa6439463869e
font_01_sfnt_off000108c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C4 11500 bytes
SHA-256: 11d5e950962f6fdf35fca39ad679457e4593067185139067bf261a23be791c05

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