Malicious PDF — malware analysis report

Static analysis result for SHA-256 d827c3fa732a395f…

MALICIOUS

PDF

79.7 KB Created: 2021-05-12 22:48:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 3d95fbe7333da1007ba1fde07d1da4dd SHA-1: 63508aaf2552bda4bee04fa7f6a8971c4bfa0569 SHA-256: d827c3fa732a395fd6033f432a8ab47b9bcf5010d58f573c6629ea73a4f9791c
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 pointing to S3 buckets and other cloud storage, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically a phishing or trojan distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xezojetit.ru/strik?utm_term=what%2527s+special+about+g+shock+watches PDF link annotation
    • https://cdn.sqhk.co/nugizape/c1eiejd/57970976791.pdfIn PDF document text
    • https://cdn.sqhk.co/jidelugob/jbxighg/kakejipozul.pdfIn PDF document text
    • https://rebazizezasij.weebly.com/uploads/1/3/4/5/134586802/xulix.pdfIn PDF document text
    • https://lulofaki.weebly.com/uploads/1/3/1/4/131453598/fogegabemozox.pdfIn PDF document text
    • https://cdn.sqhk.co/namulofilox/ihjjluo/laxumes.pdfIn PDF document text
    • https://waderiraxobo.weebly.com/uploads/1/3/4/5/134505054/gunanukile-tonevi-zitugimu-xagoti.pdfIn PDF document text
    • https://felipivi.weebly.com/uploads/1/3/1/8/131856333/5e3351810a414.pdfIn PDF document text
    • https://cdn.sqhk.co/vivokunavu/idPtmQv/klondike_forever_solitaire_mac.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/pirosisob/all_your_beauty_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/catalina_direct_link.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/starbucks_drink_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/bifuzogizojogejijikamava.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/ahu_system.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/6214381988.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/captain_sim_757_iii_ace.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/lorurokupabijodebirozutuf.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/54503744260.pdfIn PDF document text
    • https://4a31e3f8-49e3-4331-b1a9-c0bb7a6b9dbc.filesusr.com/ugd/599f1c_cf2de212b85644aaa1f8343b4e97f54d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/thoth_tarot_art_card_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/thuc_metformin_hcl_850mg.pdfIn PDF document text
    • https://s3.amazonaws.com/gogoxowiniza/karizevur.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/who_is_the_girl_in_the_picture_in_the_crown.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/how_to_determine_if_an_ion_is_paramagnetic_or_diamagnetic.pdfIn PDF document text
    • https://45f91bdd-2b68-4e60-ae2c-b14373ae5332.filesusr.com/ugd/0d089b_09ca1d3850b0403cb603d463b92c42c5.pdf?index=trueIn 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_off0000f692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF692 5440 bytes
SHA-256: 49d8acecb226d806e96363cc73f2675970740fcf425da0b22fc53819ab8edb96
font_01_sfnt_off00010939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10939 11056 bytes
SHA-256: 64fd22f3d7fa5abd26dea61b6faf41ae8f1d4a3bc3770008ed3074e92b294e76

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