Malicious PDF — malware analysis report

Static analysis result for SHA-256 53fa05100171f36b…

MALICIOUS

PDF

68.9 KB Created: 2021-01-25 23:43:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 16bf00066185012aa7c50e4da4a88e21 SHA-1: 40401cdf443f6a6d8c8193ab963d4217755323fe SHA-256: 53fa05100171f36bfa4dda8b76ad8aa01a94cbdbc92750d5b7cf4c3261557f7d
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 point to suspicious domains, indicating a link farm or phishing attempt. ClamAV and ML classifiers also flagged this file as malicious. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest the document's purpose is to redirect users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=franklin+public+schools+powerschool PDF link annotation
    • http://santaparker.store/walukurubozoguburos614.pdfIn PDF document text
    • http://vknart.xyz/51426098787dfzw.pdfIn PDF document text
    • http://vitrinachel.ru/powitojabaxegaxafogeimunl.pdfIn PDF document text
    • https://sepuvoguzunisam.weebly.com/uploads/1/3/4/4/134488558/xavesu.pdfIn PDF document text
    • http://idealica-italiauficiale.website/babylon_bee_headlinesop2dx.pdfIn PDF document text
    • http://dress-russia.ru/screen_stream_mirroring_apk_iosocjsd.pdfIn PDF document text
    • http://immorta-cross1.club/do_nasty_gal_shoes_run_true_to_sizevq4qp.pdfIn PDF document text
    • http://wildboost.club/messages_not_syncing_on_all_apple_devicesaf5ah.pdfIn PDF document text
    • https://buvonage.weebly.com/uploads/1/3/0/9/130969236/65d26fc404.pdfIn PDF document text
    • http://gogotmif.space/dirt_bike_ramp_for_sale_near_me1eq69.pdfIn PDF document text
    • https://xoruvuxana.weebly.com/uploads/1/3/2/6/132696063/sikalerodo-goxatexopufuw.pdfIn PDF document text
    • https://bizitodavil.weebly.com/uploads/1/3/4/3/134321392/tazita.pdfIn PDF document text
    • http://help-feedback-amzn3.xyz/41985133996q2t9c.pdfIn PDF document text
    • http://avto-document.site/74019836234ll2r7.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/zatazewoz/bewars_ringtones_telugu_ing.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/cutting_activities_for_kindergarten.pdfIn PDF document text
    • https://s3.amazonaws.com/futamo/32789807615.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/57364942928.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/94136794224.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/13806657982.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/online_memory_card_format_data.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/xuped.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_off0000cfdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFDF 5272 bytes
SHA-256: 0a3d4e0847d194c8b00289c3b60eefbb848e62926b63c98a677f9b057d9dd590
font_01_sfnt_off0000e1d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D1 10540 bytes
SHA-256: 2627f3f4adf9cd526e04b01c7acf58cec27694738bd77e3cbadc314fd344f7e1

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