Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5efdf99ea17fd03…

MALICIOUS

PDF

93.5 KB Created: 2021-03-16 10:07:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 44c36dfdd4c00f2e91d2cb7a64707872 SHA-1: 28c8270a3fb5282507c4f6829c79785c118db367 SHA-256: f5efdf99ea17fd0331526c9638425a566949bf22e9368bbb6cda73cb0bb94d55
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to PDF files, suggesting a link farm or SEO poisoning attempt. The presence of a critical ClamAV detection and ML classifier flagging indicates malicious intent. The embedded URLs are likely used to redirect users to phishing or malware hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://druttle.ru/strik?utm_term=naza+m+lite+software+deutsch PDF link annotation
    • https://laxivaxof.weebly.com/uploads/1/3/0/8/130874385/9ab21ae27f8.pdfIn PDF document text
    • https://sorefumegevori.weebly.com/uploads/1/3/1/8/131871670/jexiwopoxopux_farikulugojosiv.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/hhcjjq5/star_wars_movies_ranked_by_popularity.pdfIn PDF document text
    • http://bisolivagamego.22web.org/tamilgun_bahubali_2_tamil_movie.pdfIn PDF document text
    • http://vuvajujuli.mygamesonline.org/71809708392.pdfIn PDF document text
    • http://taxobadukiwad.22web.org/respectable_noun_form.pdfIn PDF document text
    • https://cdn.sqhk.co/kafodarifab/6igdXH7/bizitajifewagufolo.pdfIn PDF document text
    • http://waliwosodumobu.iblogger.org/canara_bank_sb_account_opening_form.pdfIn PDF document text
    • https://cdn.sqhk.co/tavaxikanabu/hLhghjH/8_inch_wood_craft_sticks.pdfIn PDF document text
    • https://webegerux.weebly.com/uploads/1/3/4/7/134759049/dutaga_tenajetofamuge_zalulifunegiz.pdfIn PDF document text
    • http://wemuwetafivaxe.sportsontheweb.net/banefenomudujanawe.pdfIn PDF document text
    • https://cdn.sqhk.co/gidulikegel/t3gjNgj/bedoleguvuvuzanaw.pdfIn PDF document text
    • https://fefugenaxidoseb.weebly.com/uploads/1/3/1/3/131380158/nebejidaguwux.pdfIn PDF document text
    • https://zutepojajobemo.weebly.com/uploads/1/3/1/4/131454264/binaxobajosot-kunetuvaluwuzu-jidude.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/mexesazaxasa/tesopelovoropevemagi.pdfIn PDF document text
    • https://02bc4616-4eae-4b38-b2c9-0e654f754ee0.filesusr.com/ugd/069df5_d626dde16af44368865e84443f5d3520.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/timeziso/62597280538.pdfIn PDF document text
    • https://b1b0174c-961c-4936-87f6-765e1132391e.filesusr.com/ugd/6cf804_d2b648cb7ba04759acc8dbeb3cef9ea1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gapivegek/how_to_set_the_draw_weight_on_a_compound_bow.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/how_to_write_an_email_with_a_quote_attached.pdfIn PDF document text
    • http://lajirobodogew.epizy.com/movimiento_circular_uniforme_acelerado_caracteristicas.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/21473598962.pdfIn PDF document text
    • http://wusozupit.myartsonline.com/antipsychotic_drugs_mcq.pdfIn PDF document text
    • http://mopuser.epizy.com/neumonia_por_clamidia_en_nios.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001084d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1084D 9800 bytes
SHA-256: 983345d8e9b090cd3c3662e6fba8982653867dcb8d63bd4febd4ffdc7a439871
font_01_sfnt_off000127a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127A2 5372 bytes
SHA-256: 887f9737f2912365998764f0ad07fc40858f36d9c78ea19f03716d35be6a1838
font_02_sfnt_off000139e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139E1 14516 bytes
SHA-256: fc7ae74083e3973ce53d694558d2cc09528dbf2770d1f740426d90fa7a398998

Open this report in the interactive analyzer, or submit your own file for analysis.