Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd769ec27a3455ca…

MALICIOUS

PDF

76.9 KB Created: 2021-02-27 05:00:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 31fc30c949bfc16b3c1db2edb933c437 SHA-1: 53df3d2b56b1621546650787bf37b308d657a16e SHA-256: cd769ec27a3455cae22bc82bf61e4a2885d6a985df47f7ebce2d68a280105239
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 suspicious domains, indicating a potential link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity, possibly involving embedded JavaScript to facilitate redirection or exploit delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://xajibur.ru/123?utm_term=cisco+switch+vlan+trunking+configuration+pdf PDF link annotation
    • https://vojanaxopij.weebly.com/uploads/1/3/1/4/131453451/9066963.pdfIn PDF document text
    • https://zavodazokexa.weebly.com/uploads/1/3/4/6/134632977/3574956.pdfIn PDF document text
    • http://fruktovik.com/mopejitowepuzixuki911ey.pdfIn PDF document text
    • https://rubexanow.weebly.com/uploads/1/3/5/3/135346757/zagof.pdfIn PDF document text
    • http://idealicaufficiale.website/8759127149yyutu.pdfIn PDF document text
    • https://mumanewuneju.weebly.com/uploads/1/3/2/7/132712109/jaruna_fodurudutika.pdfIn PDF document text
    • https://ruwijupoxotafan.weebly.com/uploads/1/3/0/8/130814308/foxilij_pegesado_sunopawanojab_lalunuxijaput.pdfIn PDF document text
    • http://padlamadla.site/nezonolazobobaggpr1k.pdfIn PDF document text
    • https://gunimumatepatu.weebly.com/uploads/1/3/5/3/135313318/d0339db0.pdfIn PDF document text
    • https://fuzedefona.weebly.com/uploads/1/3/4/5/134578490/bebde51.pdfIn PDF document text
    • http://avto-document.site/mimpi_ular_sawa_kejariv8xt.pdfIn PDF document text
    • https://dilipifoson.weebly.com/uploads/1/3/1/0/131070096/5569591.pdfIn PDF document text
    • https://titajava.weebly.com/uploads/1/3/4/0/134096001/1d1d85117cd.pdfIn PDF document text
    • https://vodakobawuvij.weebly.com/uploads/1/3/4/6/134627811/06051.pdfIn PDF document text
    • https://dorakipep.weebly.com/uploads/1/3/4/7/134747047/c3b298a8b5f2f0.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/metakibeme/hello_hello_bolke_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/vusufufobodibigevofuzup.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/affairscloud_current_affairs_weekly_january_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/alp_answer_key_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/aloof_crossword_clue_informal.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/python_urllib2_application_x-_www-_form-_urlencoded.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/craftsman_6.75_hp_lawn_mower_air_filter.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/sales_and_marketing_job_description.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_off0000e741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE741 5540 bytes
SHA-256: a62a311e4b419b2eb47a971f5752241c60b470926d5c2d6b69013c6385028591
font_01_sfnt_off0000fa2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2D 13812 bytes
SHA-256: e5225e46bc048e370053001bac7f63d6a3d4068372af489dcd7cecc3b7110877

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